Answer:
The candidates of the senator should be D. nine years (At least).
Step-by-step explanation:
The senate of United States includes the upper chamber which is Congress of United States along with the Representatives House; and the lower chamber comprises of legislature of the United States.
The Article 1, section 3 of the constitution states the basic three requirements for the senator candidate are:
- The candidate must be 30 years old (at least).
- The candidate must have been United States citizens for the past nine years or more.
- The candidate should be state inhabitants when they are willing to represent at their election time.