C - 0.25c is equivalent to 0.75c, though that may not be one of the choices.
Think of it as substituting c as 1.
(1) - (0.25)1 = 0.75(1)
Hope this helped you anyway! :D
It’s probably C and B. Is it right?
The function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body.
So C.