Yea the correct answer here is the option D.
Spitz is a leader of the pact, he is the alpha dog, but he is also cruel and not a very likeable dog. He is the last stepping stone for Buck who needs to become a pack leader. In this excerpt we see that with the aggressive style and violence true teamwork is impossible to achieve and here we see that on the example of Spitz.
In plural hurry is hurries
I think this sentence would be better if we put an additional 'the' before the word 'students'
So the sentence will become :
it could be dangerous to carelessly teach grammar to the students
hope this helps
What its like to be loved is having a feeling tht u never felt before
