A reason for conflict in the Middle East during President Reagan’s administration was A. political changes caused by religious differences.
B. a ban on nuclear weapons.
C. the location of US missiles in Europe.
D. the spread of leftist movements.

A. political changes caused by religious differences.

Explanation:

under president reagan (and the reagan doctrine) the us involved itself in the middle east and its political and religious affairs. people in the middle east didn't like the us' involvement however and thought the us shouldn't have been involved at all.