Answer:
B. tolerate
Step-by-step explanation:
if you replace the words that they give you as examples with the word they want you to define (ex being replace sustain with tolerate) then you should have one that makes sense.
She had lost some time, so she pushed into a quicker rhythm, one she was not sure she could sustain.
She had lost some time, so she pushed into a quicker rhythm, one she was not sure she could tolerate.
hope this helps!! Have a good day and remember to be tiger fierce!! :)