D. universal truths is the answer
Answer:
The last one, there are no opinions.
Explanation:
Answer: a
Eon, Era, Period
Explanation:
There may be 2 or more Eras in an Eon, and at least two Periods in an Era.
For example, The Phanerozoic Eon consists of the Cenozoic, Mesozoic, and Paleozoic Eras.
The Mesozoic Era consists of the Cretaceous, Jurassic, and Triassic Periods.
Astronauts hope this helped