Question

which best describes the iran-contra affair?
○ a us military build-up
○ a fight against terrorists
○ a secret diplomatic effort
○ a secret arms deal

Explanation:

The Iran-Contra Affair was a secret U.S. operation where arms were secretly sold to Iran (in violation of U.S. policy) to fund Contra rebels in Nicaragua, fitting the description of a secret arms deal. The other options are inaccurate: it was not a general military build-up, not primarily a fight against terrorists, and the core action was an arms transaction rather than just diplomatic effort.

Answer:

a secret arms deal