How many years are there in one term of office for a U.S. Senator?

The correct answer is C. 6.

A U.S. Senator serves a term of office that lasts for six years. Senators are elected to represent their states in Congress, and the six-year term allows them to focus on long-term legislative goals and avoid frequent campaigning. Each state has two Senators, and elections for Senate seats are staggered so that approximately one-third of the Senate is up for re-election every two years. If you have any more questions, feel free to ask!