In the system of share-tenancy, farmworkers a. did not choose the crops they planted. b. had more control over their crops and supplies than was true in sharecropping. c. planted seed and used supplies bought by the landowners. d. paid cash rent to the landowners.

I believe the answer is: B. had more control over their crops and supplies than was true in sharecropping. 

In the share tenancy system, the farmers usually operate the land that is owned by other people, and they are required to give some percentage of the harvest to the owners as payment. 

In this system, the owner would give the farmers with full freedom on the technique and operation of the land.