Final answer:
Charles Spearman's two-factor theory of intelligence includes a general intelligence factor (g) and specific abilities (s), which explains the ability to perform complex mental work and possess mathematical or verbal skills. correct answer to the multiple-choice question is: (C)
Step-by-step explanation:
Charles Spearman's two-factor theory of intelligence refers to the idea that intelligence consists of one general factor, known as g, which underlies all mental abilities. This part of Spearman's theory suggests that if a person is good at one intellectual pursuit, they are likely to be good at others due to this general intellectual ability. However, Spearman also proposed a second, specific factor, known as s, which accounts for individual skills in particular areas.
This encompasses Spearman's conceptualization of a general intelligence factor that applies across various domains (complex mental work) and specific abilities (mathematical or verbal skills). Therefore, the correct answer to the multiple-choice question is: (C) Ability to perform complex mental work and mathematical or verbal skills