All living things are made up of carbon. this is because
a: carbon has the ability to form single bonds, double bonds, triple bonds, and rings and form large macromolecules.
b: carbon forms very unstable bonds with all elements except for itself.
c: carbon can only form small chains of macromolecules.
d : carbon likes to make 6 bonds with many other kinds of elements and form large macromolecules.