On a Dark Spring Night, Catherine Waited Patiently While Her

On a dark spring night, Catherine waited patiently while her husband, Alex, fixed the flat tire on their car. When Alex accidently shone a trouble light on her, she was surprised to feel her fetus startle. At what stage of pregnancy must Catherine be if the fetus can react to light?

A) six weeks
B) four months
C) six months
D) 38 weeks