Answer:
C. 3
Step-by-step explanation:
During each week and month of pregnancy, different changes occur in the fetus and it develops in a very quick way, specially during the first trimester.
By the end of the first trimester the baby is already fully formed and the circulatory and urinary systems are working. By week 12 (month 3) the baby is usually 3-4 inches long and already moves its extremities and has some distinguishable features such as its nose, chin and face.
Therefore, it is approximately 3 months after conception that the fetus is bout three inches long, actively moving its arms and legs and head, and exhibiting a distinguishable face, forehead, eyelid, nose and chin.