Keep in mind that a compound predicate has two or more verbs.
Based on that information alone, we can eliminate A and B. With C, this one seems like it could work, but it actually doesn't. The verb in that sentence is "enjoy", and in this case, "skiing" and "skateboarding" are nouns. (because they're the object of the predicate verb.) That leaves D as the answer!
Hope I helped! :)
tl;dr: The answer is D!
How ironic it is to see
No one likes the budget
They must agree
But Congressmen wont budge it
Politics works this way
Democrats point fingers
Republicans do not sway
Yet the time lingers
The country has shutdown
The key has been tossed afar
Let´s again start the countdown
Or better get a crowbar
It has happened before
It will happen again
It is common lore
Pray not to go down the drain
The correct sentence should be " When one is an athlete, they should never stay out late at night."
You make this change so that the pronoun they matches with the original noun of one.
Hope this helps!
I believe the answer is A