Trent and Lindsay Had Vaginal Sex a Few Times Before

Trent and Lindsay had vaginal sex a few times before Trent told Lindsay he has been diagnosed with chlamydia. Lindsay, who has not noticed any symptoms that she is ill, just discovered she is three months pregnant. Lindsay . . .

A) should not worry because she has no symptoms, and the large majority of women with chlamydia have noticeable symptoms.
B) should not worry because chlamydia is primarily transmitted through anal sex.
C) should be very concerned because chlamydia cannot be treated by any currently available methods.
D) should be concerned, in part because chlamydia could cause complications for her unborn child.