What are Okazaki fragments? A. parts of DNA that were replicated incorrectly
B. the part of the DNA in the replication bubble
C. pieces that are replicated on the
discontinuous strand
D. the sequence that guides enzymes where to
begin separating strands

I think the answer is:

the sequence that guides enzymes where to begin separating strands

i'd say that the moon rock is about 2.2 billion years old.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.