1141ForestryMedium
The standard grades of ordinary thinning is:
AModerate Thinning (B-Grade)
BLight Thinning (A-Grade)
CVery Heavy Thinning (D-Grade)
DAll of the above
EHeavy Thinning (C-Grade)
Correct answer
D. All of the above
Explanation
The correct answer is All of the above.