Question

which is one piece of information that astronomers use to calculate the age of the universe? dark energy the age of rocks on earth the current motion of inner planets patterns of background radiation

Explanation:

Astronomers use cosmic microwave background radiation patterns. It is a remnant of the early universe and its properties help in estimating the age of the universe. Dark energy affects the expansion rate but not directly used for age - calculation. Earth - rock ages only tell about Earth. Inner - planet motion doesn't relate to the universe's age.

Answer:

D. patterns of background radiation