L1, L2 are two lists of integers, X is an integer, to insert the last item in L1 at the end of L2 we write Select one: O a. L1.retrieve(L1.size(,X); L2.insert(L2.size(0,X); O b. L1.retrieve(L1.size0-1,X); L2.insert(L1.size0.X); Oc. L1.retrieve(L1.size(-1,X); L2.insert(L2.size()-1,X); O d. L1.retrieve(L1.size()-1,X); L2.insert(L2.size(),X);

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