What is true about both theories and laws A) change over time
B) supported by observations
C) cannot be proven
D) require consensus

B

Explanation:

if u notice all the theories and laws are all supported by some kind of experiments which are the scientist's observations be4 giving the laws and theories so i think B is the answer

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

the correct answer is d