Brad wonders if he will have a problem later in life with alcoholism. His father is an alcoholic and his great-grandfatheer had a problem holding a job due to his drinkng habits. After reading this lesson, Brad believes that a/an ______ study would give him the best information. a. experimental b. psychometric c. linkage d. sociobiological which answer would be the correct one?

I think it is "C" linkage