A participle has the following form: verb + -ing, and the only word in this sentence that takes that form is A, 'flying', which is the correct answer.
The answer is A commanding
I think it is a run-on sentence.
Answer:
When visiting Rocky Mountain National Park, many visitors drive the Trail Ridge Road for
stunning views or they climb the 14,259-foot-high Longs Peak.
Explanation:
The sentence is very correct.
