Ronald Reagan's was first Supreme Court appointment considered historic because He selected Sandra Day O'Connor the first female Supreme Court justice.
Answer: Option A
Step-by-step explanation:
Ronal Regan is known for making a historic decision not only in the history of the United States of America but also in the history of its country’s judiciary. He appointed Sandra Day O Connor to serve in the Supreme Court in the United States of America.
Thus making her the first woman to serve in the Supreme Court of the United States of America as he felt that Connor’s perspectives towards abortion would be accepted by the conservatives.