depth of soil amount of rainfall the amount of land available the number of seeds available
I gave my students this multiple choice question: Farmers grow different types of crops. Which of the following factors would most affect the type of crop a farmer grows?

Only one answer is correct among these 4 choices:
- depth of soil
- amount of rainfall
- the amount of land available
- the number of seeds available

Could you tell me which one is correct?

amount of rainfall