Study the diagram of the geologic time scale.

Which method is most likely used to identify what happened before the start of the Paleozoic era?

Scientists study fossils from the Jurassic period.

Scientists observe index fossil records of the Mesozoic era.

Scientists examine fossil evidence during the Precambrian time.

Scientists explore the emergence of mammals and humans in the Cenozoic era.

C

Explanation:

The precambrian era was the era where scientist to this day have been looking at on and how things started. this would be the correct answer.

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every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

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