Concept:In a presidential system, the executive and the legislature are separate and independently elected.
Explanation:The president and the legislature are chosen through separate elections.
Each branch serves a fixed term of office.
Neither branch owes its tenure to the other.
For example, in Nigeria, both the president and legislators are elected for fixed terms.
The terms are not unfixed, and they are not appointed by the judiciary.
Answer:D. elected separately to a fixed term.