Answer:
D. Officially approved.
Step-by-step explanation:
The word "bona fide" generally refers to something that is true, genuine, rare, legit, honest, etc. In simple words, it means something that is not fake or is questionable.
Now, in the usage of the word in the given passage, "bona fide" is associated or used in the context of "restrictions concerning navigation and operations" that counties or cities can implement. And in that restriction, permits may be given to "bona fide yacht clubs, water skis... ." So, the word "bona fide can be changed to "officially approved" to retain the same meaning.
Thus, the correct answer is option D.