Which sentence has an infinitive phrase that functions as the subject? Guides are happy to meet the needs of visitors. The Yellowstone River flows north to the valley. The hike to Mount Washburn reveals beautiful scenery. To hunt in the park is a serious offense.

Respuesta :

The sentence that has an infinitive phrase that functions as the subject is the last one - To hunt in the park is a serious offense. 
1 is not correct because the infinitive to meet is not used as a subject here. 2 is also incorrect because there is no infinitive here, as well as in 3.