The Strategic Defense Initiative “Star Wars” was a costly: a. Plan for international alliance
b. Bomber
c. Nuclear missile defense system
d. Communications system

Option: c. Nuclear missile defense system  

Explanation:

The Strategic Defense Initiative was a U.S. missile defense program which played a prominent role in the United States and Soviet relations in the 1980s and is often associated with helping to end the Cold War. The Strategic Defense Initiative was an enthusiastic plan for building a high-tech system to damage opponent missiles before they could enter the United States. Analysts called it Star Wars, based on lasers and satellite technology.

here you go hope it heps "horace mann"

true is the answer to this