Pretty sure it’s A. period
<span>A monomer is a molecule that, as a unit, binds chemically or supramolecularly to other molecules to form a supramolecular polymer. Large numbers of monomer units combine to form polymers in a process called polymerization</span>
B. 169ft2 Because you have to do l*w
there are no choices of phases here
I would say A is the right one
