Consider the copolymer equation of binary copolymerization between monomers M1 and M2 {[M1]/[M2]}copolymer = {[M1/[M2]}(r1[M1]+[M2])/(r2[M2]+[M1])What does the term [M1] on the right hand signify here?

• A. absolute molar concentration of monomer M1
• B. molar concentration of monomer M1 in feed
• C. molar concentration of monomer M1 in copolymer
• D. none of the mentioned