Historically Speaking, __________ It Was Believed That for Conception to Occur

Historically speaking, __________ it was believed that for conception to occur, both the man and the woman had to emit a "seed" and that the "seed" was only released through orgasm.

A) from the 2nd century BCE to the 1400s
B) from the 3rd century BCE to the 1500s
C) from the 4th century BCE to the 1800s
D) from the 5th century BCE to the 1900s