Monocots Such as Palms and Bamboo Achieve Considerable Increase in Girth

Monocots such as palms and bamboo achieve considerable increase in girth by:

A) a modified form of secondary growth in which parenchyma cells divide and enlarge.
B) primary growth.
C) a modified form of primary growth in which parenchyma cells divide and enlarge.
D) enlargement of primary xylem.
E) enlargement of primary phloem.