Which adage best describes the paragraph?

russ was interested in participating in a teen triathlon. in the race, he’d have to swim 125 yards, bike 2.75 miles, and run one mile. he had been practicing for weeks, but between schoolwork and his sports teams, he found it hard to keep up the pace. it was just too demanding for him.

a.
the grass is always greener on the other side.

b.
a chain is as strong as its weakest link.

c.
if you don’t like the heat, get out of the kitchen.

d.
let sleeping dogs lie.