100 POINTS HELP Select all the correct answers.

What contributions did Aristotle make during the Hellenistic era?
He was the director of the library in Alexandria.
He said that reason was the key to learning.
He promoted the use of questions to help students learn.
He estimated Earth’s circumference using geometry.
He classified the names of many animals.

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Explanation:

The correct answers are B and C.

Explanation:

Aristotle believed that reason was the key to learning. He also classified the names of many animals. But it was Socrates who promoted the use of questions to help students learn, and it was Eratosthenes who estimated Earth's circumference using geometry.

do all equestions have to be answered

answer; the federal reserve system;