Last Summer,Casey Took Fresh Vegetables to Sell at the Farmer's

Last summer,Casey took fresh vegetables to sell at the Farmer's Market,but this year,Casey did not plant any vegetables and went to work at the local bank.
Refer to the information above.It was easy for Casey to leave the vegetable growing business because:

A) the productive resources that Casey used were mobile.
B) vegetable growing is a seasonal occupation.
C) demand for vegetables is price inelastic.
D) inputs to vegetable production are specialized.