Would you expect polyethylene to polymerize at a faster or slower rate than polymethylmethacrylate? Explain

In radical polymerization, an acrylate forms secondary radicals as the propagating end group, while a methacrylate forms tertiary radicals (which is more stable than a secondary radical). The stability of the tertiary radical is thought to lower the reactivity of the propagating end for further polymerization.

the answer is definitely c.

it's c. elements are placed in rows based on how may valencies electrons have.