Question

Living organisms contain many complicated molecules. Which of these is a reason that carbon is important in these molecules?

A) a carbon atom can form a bond with only one other carbon atom
B) carbon bonds with the lightest and smallest element
C) a carbon atom can only form one bond at a time with another atom
D) carbon forms both single and double bonds

Answer 1

I'd say the answer is D

Answer 2

the answer is D) carbon forms both single and double bonds.