Question

If both the president and the vice president are unable to fulfill their duties, who takes over as president?

a. Attorney general
b. Secretary of state
c. Speaker of the House
d. President pro tempore of the Senate

Answer 1

Who will perform the duties of the president, if the president can't, is specified by the presidential line of succession.

After the president and vice-president, the next in line is the speaker of the House (answer c)