From where did the carbon in all living things come?

it was made during the big bang.

it was made in stars that lived before the solar system formed.

it was made in the formation of the solar system.

it was produced by cyanobacteria.

For anyone who is still taking the test the correct answer, was option number B, Or #2

It was made in stars that lived before the solar system formed.

B: It was made in stars that lived before the solar system formed.

I just took this test i hope this helps!

thinking it would be physical characteristics

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project