Question

4 which personal pronoun agrees in number with \cassie and rita?\
a her
b she
c they
d hers

Explanation:

"Cassie and Rita" is a plural subject (two people), so we need a plural personal pronoun. "Her" (A) and "She" (B) are singular feminine pronouns, "Hers" (D) is a singular possessive pronoun. "They" (C) is a plural personal pronoun that agrees in number with the plural subject "Cassie and Rita".

Answer:

C. They