Which of the following sentences demonstrates correct subject-verb agreement

Question

A. Them visit their grandparents last weekend
B. They children visited their grandparents last weekend
C. The children visits their grandparents last weekend
D. The children visited their grandparents last weekend

Answer 1

D. The children visited their grandparents last weekend.

This sentence demonstrates correct subject-verb agreement, as "children" (plural subject) correctly pairs with "visited" (plural verb).