Answer:
a. g-factor.
Explanation:
G-factor: The term "g-factor" is also referred "general intelligence factor", "general intelligence", or "general mental ability", and is described as a construct that is being developed in "psychometric investigation" associated with the human intelligence & cognitive abilities. The g-factor tends to target a specific measure of "general intelligence". An individual who holds this view ought to believe that someone's intelligence can be expressed & measured via a single number, for example, IQ score.
In the question above, the given statement represents "g-factor".
