The correct option is C Cambium
Active division occur in cells of meristem. Meristem is of two types - primary meristem and secondary meristem. Apical meristem are primary meristem responsible for primary growth or elongation of plants. Lateral meristem or cambium is secondary meristem which ie responsible for increase in girth.
Collenchyma is a simple permanent tissue which has lost the ability to divide temporarily or permanently.
Xylem and Phloem are complex permanent tissues and cannot divide further.