it CAn BE inFErrED From thE pAssAgE thAt thE AvAilABility oF tEmpErAturE-DEpth rECorDs ForAny spECiFiC ArEA in thE unitED stAtEs DEpEnDs primArily on thE______.
A．possiBility thAt hDr's mAy BE FounD in thAt ArEA
B．ExistEnCE oF prEvious AttEmpts to oBtAin oil or gAs in thAt ArEA
C．history oF suCCEssFul hot wAtEr or stEAm rECovEry EFForts in thAt ArEA
D．FAilurE oF inhABitAnts to ConsErvE oil or gAs rEsErvEs in thAt ArEA