Which of the following is true about nuclear fusion in stars? A.
The process combines heavier elements to form lighter elements.
B.
The process occurs near the stars' surfaces, but not inside their cores.
C.
The process releases great amounts of energy over millions or billions of years.
D.
all of these

C.

The process releases great amounts of energy over millions or billions of years.

Explanation:

study island 8th grade

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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.

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