Part of the functionality of member function _________ can be performed by member function lower_bound.

A(n) ____ means the user has initiated an action that causes the program to perform the type of processing called for by the user's action.

A. link B. assignment C. event D. activation

Using which Social engineering principle might an attacker impersonate a CEO of a company?

A. Scarcity B. Authority C. Urgency D. Trust