Field work includes:
ATrees with abnormal defects such as fork, broken top, etc.
BSelection of trees
CAll of the above
DSeparate sets of trees may be required for different methods of thinning, origin of crops, etc.
ETrees of typical height and development should be selected in crops covering the range of distribution to which the results are to be applied
Correct answer
C. All of the above
Explanation
The correct answer is All of the above.