Shirin Came Down with a Case of Rubella in the Eleventh

Multiple Choice

Shirin came down with a case of rubella in the eleventh week of pregnancy. As a result, her child was born blind. On the other hand, Sohair came down with a case of rubella in the thirtieth week of pregnancy. As a result, her child was unaffected. Shirin's child was exposed during a(n) __________ in development.

A) integral period
B) sensitive period
C) critical period
D) definitive period