Which of the Following Best Describes How Cattell Contributed to the Trait

Which of the following best describes how Cattell contributed to the trait approach?

A) Cattell took previously collected adjectives that describe personality and had participants rated on each trait. Factor analysis was used to cluster and make connections between the traits.
B) Cattell created a list of all adjectives in English that can be used to describe personality, and created an alphabetical listing of them.
C) Cattell launched the trait approach by putting all people into opposite categories of the same trait. That is a person is either extroverted or introverted and also either optimistic or pessimistic.
D) Cattell created a set of personality types based on prior research done by others, creating the types by clustering sets of trait adjectives that had similar underlying ideas.
E) Cattell analyzed the motivations that were important to each individual, and characterized each person in terms of the motivation that was most important for him or her.