Defoliation generally has the least severe effect on a grass plant in which period? a. During dormancy

Question:

Defoliation generally has the least severe effect on a grass plant in which period?
a. During dormancy
b. There is no most critical period
c. In the period from seed formation to dormancy
d. In the period from spring initiation of growth to seed formation
e. In the spring when the plant first initiates growth