Answer:
B because it is talking about illumination which is lighting something up.
Explanation:
c, 22,800 (4 half lifes, 1/2, 1/4, 1/8, 1/16)
The uterine lining, or endometrium, is the internal layer of the uterus which thickens and gets filled with blood vessels in preparation to receive a fertilized egg. If this does not happen, the uterus removes this extra layer through the vagina, in a process called menstrual flow, which lasts 5 days average.
