What is the theme of this fable?

a pair of goats were on opposite ends of a ravine. a log connected the two ends, and
each wanted to cross to the other's side. The goats both walked down the log from
either end and met in the middle. Neither was willing to budge to let the other pass.
Instead, they butted up against each other until they were both thrown into the
ravine below.

A: If you work hard, you get what you deserve

B: Stubborn behavior leads to rewards

C: If you are not willing to be flexile, the results can be disastrous

D: Goats are stubborn