Which statement best describes the relative conductivity of semiconductors? a. they are the most conductive elements. b. they are the least conductive elements. c. they are more conductive than metals but less conductive than nonmetals. d. they are more conductive than nonmetals but less conductive than metals.

The answer is D. They are more conductive than nonmetals but less conductive than metals. 

A semiconductor is a solid substance with a relative conductivity that is higher than insulators but considerably lower than conductors. Metals are known for their good conductivity and non-metals are known for their poor conductivity. This is why the metalloids are semiconductors. Metalloids are elements that have some properties of metals and metalloids.