I am confused about how to use "not to mention". Does it take to infinitive or bare infinitive?
In the 3rd Practice Test of the Official Guide of SAT, there is the 38th question. Here I quote from the passage:
For centuries, cats have guarded this famous museum, [ridding] it of mice, rats, and other rodents that could damage the art, not to mention 【38】scared off visitors.
The choices of this question are:
A. scared
B. scaring
C. scare
D. have scared.
The Official Guide has offered the key, which is C.