The presidential system differs from the parliamentary system of government in that

A.

The principle of collective responsibility applies

B.

Executive and legislative powers are fused

C.

Powers of the three arms of government are merged

D.

The tenure of office of the president is limited

Correct answer is D

The salient distinction between the two classes of systems is that, in a presidential system, executive power is constitutionally vested in a single individual (i.e., the president) for a limited number of years, whereas, in a parliamentary system, executive power is vested in the legislature (i.e., parliament, which chooses a prime minister)