in thE northAmEriCAn ColoniEs, rED wArE, A simplE pottEry FirED At low tEmpErAturEs, AnD stonE　　　 wArE, A strong, impErvious grEy pottEry FirED At high tEmpErAturEs, wErE proDuCED From two　　　 DiFFErEnt nAtivE ClAys. thEsE kinD oF pottEry wErE proDuCED to supplEmEnt importEDEuropEAn　　　 pottEry. whEn thEAmEriCAn rEvolution (1775-1783) intErruptED thE Flow oF thE supEriorEuropEAn(5) 　 wArE, thErE wAs inCEntivE ForAmEriCAn pottErs to rEplACE thE imports with CompArABlE DomEstiC　　　 gooDs. stonEwArE, whiCh hAD BEEn simplE, utilitAriAn kitChEnwArE, grEw inCrEAsingly ornAtE　　　 throughout thE ninEtEEnth CEntury, AnD in ADDition to thE EArliEr sCrAtChED AnD DrAwn DEsigns,　　　 thrEE-DimEnsionAl molDED rEliEF DECorAtion BECAmE populAr. rEprEsEntAtionAl motiFs lArgEly　　　 rEplACED thE EArliEr ABstrACt DECorAtions.BirDs AnD FlowErs wErE pArtiCulArly EviDEnt, But othEr(10)　 suBjECts---lions, FlAgs, AnD ClippEr ships---ArE FounD、somE FigurinEs, mAinly oF Dogs AnD lions,　　　 wErE mADE in this mEDium. somEtimEs A nAmE, usuAlly thAt oF thE pottEr, wAs DiE-stAmpED onto A　　　 piECE.　　　 As morE AnD morE lArgE kilns wErE Built to CrEAtE thE high-FirED stonEwArE, ExpErimEnts rEvEAlED　　　 thAt thE sAmE ClAy usED to proDuCE low-FirED rED wArE CoulD proDuCE A strongEr, pAlEr pottEry iF(15)　 FirED At A hottEr tEmpErAturE. thE rEsult wAs yEllow wArE, usED lArgEly For sErviCEABlE itEms; But A　　　 FurthEr DEvElopmEnt wAs roCkinghAm wArE---onE oF thE most importAntAmEriCAn CErAmiCs oF thE　　　 ninEtEEnth CEntury. (thE nAmE oF thE wArE wAs proBABly DErivED From its rEsEmBlAnCE toEnglish　　　 Brown-glAzED EArthEnwArE mADE in south yorkshirE.) it wAs CrEAtED By ADDing A Brown glAzE to　　　 thE FirED ClAy, usuAlly giving thE FinishED proDuCt A mottlED AppEArAnCE. vArious mEthoDs oF(20)　 spAttEring or sponging thE glAzE onto thE wArE ACCount For thE ExtrEmEly wiDE vAriAtions in Color　　　 AnD ADD to thE intErEst oF CollECting roCkinghAm.An ADvAnCED Form oF roCkinghAm wAs Flint　　　 EnAmEl, CrEAtED By Dusting mEtAlliC powDErs onto thE roCkinghAm glAzE to proDuCE BrilliAnt　　　 vAriColorED strEAks.　　　 ArtiClEs For nEArly EvEry housEholD ACtivity AnD ornAmEnt CoulD BE Bought in roCkinghAm wArE:(25)　DishEs AnD Bowls, oF CoursE; Also BEDpAns, Foot wArmErs, CuspiDors, lAmp BAsEs, DoorknoBs,　　　 molDs, piCturE FrAmEs, EvEn CurtAin tiEBACks.All thEsE itEms ArE highly CollECtiBlE toDAy AnD ArE　　　 EAgErly sought.
A、FEw roCkinghAm spECiAltiEs CommAnD pArtiCulAr AFFECtion Among CollECtors AnD　　　 CorrEsponDingly high priCEs.why DiD thE pottErs DisCussED in thE pAssAgE ChAngE thE kinD oF pottEry thEy mADE
A、thEy DisCovErED A nEw kinD oF ClAy.
B、thEy wErE CompEnsAtion For thE loss oF An ovErsEAs suppliEr.
C．thEy stuDiED nEw tEChniquEs inEuropE.
D．thE pottEry thEy hAD BEEn proDuCing wAs not vEry strong.