Is It Me?!

In the vocabulary section of the final exam for my French class, there was the following question:

Je n'aime pas que le professeur donne une interrogation sans nous ______.

a. apprendre

b. enlever

c. retirer

d. avertir

The correct answer, of course, is (d), making the sentence: 'I don't like it that the teacher gives quizzes without notifying us.'

Most of the students, however (almost exclusively, in fact) opted for (a), making the sentence: 'I don't like it that the teacher gives quizzes without teaching us.'

Are they trying to tell me something??