As for the long-term reward, you will find that you understand the world around you a little better as the
words you've learned pop up in future conversations.
Sentence B: Learning a new word each day means you will
never fail to have something to say and the right words to
say it.
Sentence C: When you practice using new words in
everyday life, you will strengthen your ability to express
yourself

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.

there's only 5: 00 to complete answer can i comment

what are the questions?