Answer:
A) Dodo
Explanation:
The dodo is not endangered because it is already extinct (as noted earlier in the paragraph).
The truth is that it makes an essay easier to read. If you write an essay without any transitional phrase or word it would sound like when a car runs over a whole on the ground. In general, it just makes it look more formal and in some manner makes it easier and more interesting to read.
I think it will depend what your average is of all your classes combined. I don’t think one class will matter that much but you might need to retake that one class.