Can someone plz help me? :(

Which description provides the best objective summary of the article in the passage?

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13

Explain why autonomous underwater explorers (aue) will provide entirely new kinds of information about ocean processes