Use reasoning to lead to the answer of the following question:
Where does lengthening and widening occur in plant roots?\nOptions:\n- (A) meristems\n- (B) Epidermis\n- (C) cracking\n- (D) allow growth\n- (E) buds\n- (F) stamens\n- (G) epidermal\n- (H) fruits

(A)
Roots have primary and secondary meristems for growth in length and width.

Growth occurs in meristems.

Without meristems, roots couldn't lengthen or widen.

.

Final answer: (A)