What are the United States' policy goals and obstacles in addressing Iran's nuclear program?

• A. Goals: accelerate Iran's nuclear program; obstacles: sanctions.
• B. Goals: prevent a nuclear-armed Iran, prevent proliferation, ensure regional stability; obstacles: negotiations with adversaries and allies, compliance monitoring, sanctions resilience, competing regional dynamics.
• C. Goals: remove all sanctions; obstacles: none.
• D. Goals: regime change through force; obstacles: lack of support.

Answer: (B)