Please can you identify me what kind of sentence fault is this?
And please how should I correct it?

: Our instructor warned us that he would give surprise tests, the assignment of term papers, and allow no make up exams.

Thank you so much!

Kafka originally referred to gregor's parents as “the mother” and “the father”. however, the translator refers to them as “his mother” and “his father”. why might the translator use “his” instead of “the”? a. the word “his” makes the story smoother to read in english. b. the word “his” allows gregor’s parents to become more central characters. c. the word “his” makes gregor’s parents sound less loving. d. the word “his” creates a more negative tone.