Final answer:
According to Eysenck, the Big Five trait of extraversion is related to sociability, but it is not described as a blend of distinct temperaments like emotionality and sociability, so the correct answer is (d) None of these answers are correct.
Step-by-step explanation:
According to Eysenck's theory of personality, the Big Five trait of extraversion may be closely related to sociability as well as levels of activity, which can be understood through Eysenck's extraversion-introversion spectrum. However, in the context of Eysenck's dimensions of personality which include extraversion/introversion and neuroticism/stability, extraversion itself is not described as a blend of separate temperaments, but rather as a single, broader dimension characterized by traits such as sociability, assertiveness, and excitement-seeking. Therefore, the answer to the student's question would be (d) None of these answers are correct, as extraversion, within Eysenck's model, is not specifically identified as a combination of emotionality and another trait.