By the End of the Third Month, the Typical Fetus

By the end of the third month, the typical fetus can be described as "three times three" because __________.

A) it has been 3 months and the fetus weighs 3 ounces and is 3 inches long
B) it weighs 3 pounds, is 3 inches long, and has 3 senses
C) 3 major systems have developed: brain, heart, and lungs
D) all 3 facial features are clearly distinguishable