Redistricting: a. happens every 4 years. b. is conducted by state legislatures. c. must be approved by Congress. d. must be approved by the highest court in each state. e. has little appreciable effect on who wins or loses congressional races.

The answer is B - is conducted by state legislatures

Explanation:

Redistricting is the process of adjusting the districts that determine who represents us. It is the process of drawing electoral district boundaries in the United States. Reapportionment occurs every ten years. In most states, the state legislature has primary control of the redistricting process and in many cases it is subject to approval by the state governor.

Most of our federal legislators, all of our state legislators, and many of our local legislators in towns and counties are elected from districts. These districts divide states and the people who live there into geographical territories.