Concept:Use the set difference identity X−Y=X∩Yc and De Morgan’s law.Explanation:Let B−C=B∩Cc.So, A−(B−C)=A∩(B−C)c.By De Morgan’s law, (B∩Cc)c=Bc∪C.Thus, A∩(Bc∪C)=(A∩Bc)∪(A∩C).Since A∩Bc=A−B, we get A−(B−C)=(A−B)∪(A∩C).This matches option A.Answer:(A−B)∪(A∩C)