Brandy works in a laboratory. She performs experiments to develop new methods of food production and processing. Her job is best described as a(n):

Clarence is an independent worker who offers his pervices to many different farms. He teaches farmers how to run their farms more efficiently and safely. Clarence's job is best described as a(n):

Leon hires and manages workers who handpick oranges and other fruits on farms. He trains and oversees the
workers. Leon's job is best described as a(n):

The choice are:

Buyer or Purchasing Agent, Farm Labor Contractor, Food Scientist, Farm Management Adviser