—Would you like to come to dinner tonight?

—I’d like to,________I’m so busy.

—Would you like to come to dinner tonight?

—I’d like to,________I’m so busy.

1. A.
   and
2. B.
   if
3. C.
   so
4. D.
   but

?Would you like to come to dinner tonight?

?I'd like to, ________ I'm too busy.

A. and

B. if

C. so

D. but