PLzzzzzz Hellllp I am doing my Spring breakkk work sheeeet and I need hellllllp, PLeasssse


28.What is the best way to rewrite the underlined words below to make one sentence?

By 1936, the group started to partner with commercial bakers to sell cookies across the nation. Since then, Girl Scout cookies have become more than a fundraiser.

A. the nation; and since then,
B. the nation and since then,
C. the nation, and since then,
D. the nation and, since then,