Improving your skill-related components of fitness will you in an activity.
a. comforably
b. better
c. smarter
d. evenly

She either must have not been on the phone and working or something else. it seems that here boss catches her a lot of the time on the phone and not doing work but hasn't been fired yet.

Betray, destroy, and obey do not need to be changed to add the suffix -ed, because the "y" at the end of each word is preceded by a vowel  (so  they would be spelled  "betrayed," "destroyed," and "obeyed").

but hurry is different; it has to  be spelled "hurried" because the "y" at the end of "hurry" is preceded by a consonant.