Its d because must wouldn't make sense, could wouldn't make sense, and would wouldn't make sense either so therfore its d
Im not sure best guess is B
Answer:
Moving too quickly could cause Bill and his dogs to become ill or die.
Explanation:
the passage sates Speed was important, but he could not push his team too hard. The dogs' lungs might frost from breathing heavily in the Arctic air.
Answer:
Change "his" to "Alex's".
Explanation:
This is the only confusing pronoun in the text.
I am pretty sure it is "became". Hope that helped :)
