Cotton FArmErs inCEntrAlAmEriCA BEgAn to usE pEstiCiDEs
A、BECAusE oF An intEnsivE govErnmEnt ADvErtising CAmpAign.
B．in rEsponsE to thE AppEArAnCE oF nEw vAriEtiEs oF pEst.
C．As A rEsult oF ChAngEs in thE sEAsons AnD thE ClimAtE.
D．to EnsurE morE Cotton wAs hArvEstED From EACh Crop.