Final answer:
The U.S. Post Office issued a stamp for the FFA in 1985.
Step-by-step explanation:
The correct answer is d. 1985. The U.S. Post Office issued a stamp commemorating the 50th anniversary of the Future Farmers of America (FFA) in 1985. This stamp featured the FFA emblem and a landscape with a barn and tractor. It was part of the Great Americans series and was designed by Jim Sharpe.