Which of the Following Is True of Pregnancy Tests

Multiple Choice

Which of the following is true of pregnancy tests?

A) The most common pregnancy test is based on detecting hCG in a woman's urine.
B) The later it is done, the more difficult it is for laboratory tests to detect pregnancy.
C) Laboratory tests produce more false negatives than home pregnancy tests.
D) Most over-the-counter pregnancy tests can detect ectopic pregnancies.