Answer:
C. When all arguments are false
Step-by-step explanation:
A logical function is a function that returns true or false depending on the result of evaluating the condition attached to the function.
OR logical function is a type of logical function that returns TRUE if any argument is true and returns FALSE if all arguments are false. So, at least, if one of the arguments is true, it evaluates to True.
All options; Option A, Option B and Option D will evaluate to True because at least one of their arguments is true. While Option C will evaluate to False as all of its arguments are False.
Option C is the correct answer.