<h2>A is the correct answer!</h2><h3></h3><h3>I'm too lazy to explain :(</h3><h3></h3><h3><em>Please let me know if I am wrong.</em></h3>
Answer:
The Precambrian Era comprises all of geologic time prior to 600 million years ago. The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period.
Explanation:
Testable hypotheses could be developed for questions <em>B, D, and E</em> .
The main problem with A and C is the word "better". This is a rubber word. It means different things to different people, and it can mean different things to the same person at different times. It's always a matter of opinion, it has no unique units of measure, and there is no concrete way to measure it. Not good for developing a testable hypothesis.
