Consider the following statements regarding the weaver's method of crop combination.
A) He proposed a method of analysis superior to the simple inspection of the relative weights of the enterprises in a given area.
B) He added a time dimension to the notion that Britain's best and worst agricultural land has not changed during the last century.
C) He sought to find the number of enterprises that minimized the difference between the actual and theoretical enterprise combinations.
D) He adopted a measure of yield defined as the potential production of one acre of good average farmland under good management.
Choose the correct answer from the options given below:
1. A, B and C only
2. A, C and D only
3. A and B only
4. A and C only