Answer: RACE
Explanation:
That is the variable factor here is the RACE of the men in the study.
A longitudinal study is the kind of study that that Dr. Sroufe describes in which he followed one group of individuals from infancy into early adulthood.
This study aims to gather data in a long span of time, which fits perfectly in a person’s stage of life range during their infancy until their early adulthood stage.
I believe the answer is: Deductive argument
In deductive argument,we make<span> the conclusion by </span>reductively<span> by applying general rules to narrow potential possibilities until there is one possibility remains. Deductive argument is considered to be using 'top-down logic' and most commonly used in an investigative process.</span>