1. how long must candidates for senator have been citizens of the united states?
a at least four years
b at least two years
c at least six years
od at least nine years
answer is 9 years

The candidates of the senator should be D. nine years (At least).

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:

freedom of speech is also protected by the 1 amendment.

explanation:

here is pretty much what the 1st amendment says:

congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.