________ is merely a modification of the uniform system where large quantities of advance growth of various ages and size even up to trees of 40 cm diameter are retained as part of the future crop:

A. Irregular Shelterwood system
B. Coppice system
C. Both (a) & (b)
D. None of these

The correct answer to the question: "________ is merely a modification of the uniform system where large quantities of advance growth of various ages and size even up to trees of 40 cm diameter are retained as part of the future crop:" is "Coppice system".