What was the JCPOA concerning Iran, and what were the consequences of the U.S. withdrawal in 2018?

• A. JCPOA limited Iran's nuclear program with inspections and sanctions relief in exchange for constraints.
• B. JCPOA allowed Iran unlimited enrichment.
• C. JCPOA eliminated all sanctions immediately.
• D. JCPOA did not involve inspections.

Answer: (A)