It means don't be expecting much. When people hold their breath, they are waiting for something to happen. WHen people give the advice of dont hold your breath, they are saying taht there isn't anything going to happen
Cis the answer
a isnt about guide dogs
b its just dog training nothing about service dogs
d not dogs
Imagery will be used because its describing something but inside of your head (imagine)
The answer is C: to finish.