In a group of five friends: Alice, Bob, Charlie, David, and Eva, Alice is a teacher, Bob is a doctor, Charlie is a lawyer, David is a teacher, and Eva is a nurse. Which of the following statements is true?

A. ALICE AND DAVID ARE BOTH TEACHERS.

Three friends, X, Y, and Z, have different pets: a dog, a cat, and a bird. X does not have a dog. Y has a cat. What pet does Z have?

C. BIRD

A set of animals includes a dog, a cat, a parrot, a goldfish, and a hamster. Which animal is not a mammal?

C. PARROT

In a group of five people, A, B, C, D, and E, each has a different favorite color: Red, Blue, Green, Yellow, and Black. A does not like Blue or Green. B likes Red. C does not like Yellow. D likes Green. What color does E like?

D. BLACK

In a family, there are four members: a mother, a father, a son, and a daughter. If the mother is a doctor and the father is an engineer, what is the profession of the son if he is studying to become a doctor?

C. STUDENT