Answer:
"none of them accepts"
Explanation:
We know that at least one of the thirteen women accepts going for a date.
The complement of an event refers to the opposite description of such event.
So, if at least one of them accepts, the opposite would be that "none of them accepts"
Given: Of the thirteen different women Calvin asks for a date, at least one of them accepts.
Complement: Of the thirteen different women Calvin asks for a date, none of them accepts.