In this article the author explains what scientists are trying to find out. What are the scientists in the article trying to find out?
Question 2 options:

A .when sulfur first appeared in Earth’s early atmosphere

B .how the proportions of different sulfur isotopes change in the geologic record

C .how the ozone layer formed and the effects of its formation

D .when oxygen increased in Earth’s early atmosphere

Hi, did you forget to mention that this question is about the article "The Rise of Oxygen in the Earth's Atmosphere" by American Museum of Natural History

D. when oxygen increased in Earth’s early atmosphere

Explanation:

Right at the beginning of the article we can find out what scientists are trying to discover. This is because the introduction of the article introduces us to Grant Young and Jay Kaufman, a university professor and a geologist, respectively, who are the main scientists in the study that seeks to discover and set firm dates for the increase in oxygen in the Earth's primitive atmosphere.

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the answer would be knowledge about cars!