Question

How long did it take for the Thirteenth Amendment to be ratified by state legislatures after it was passed by Congress? less than six months less than a year more than a year more than two years

Answer 1

Less than a year definitely. The Thirteenth Amendment was passed by both houses of Congress by January 31 of 1865 and was ratified by 3/4th of the states by December 6 of 1865.

Answer 2

"Less than a year"  is the answer