Conversation so far:
What changes were made in the group in 1986?
During the recording of the group's first studio album Exposure, the personnel of the group changed.
How did it change?
According to People magazine, one of the original singers quit while two of the girls were fired midway through the recording of the first album.

Question: Why were two fired?
Self-contained rewrite: Why were two girls fired from Exposé through the recording of the first album?