Identify the sentence in which the underlined clause is a noun clause that functions as the object of a preposition. These experts say that the best time to begin a dog’s training is when the dog is still a puppy.

These experts say that the best time to begin a dog’s training is when the dog is still a puppy.

Whoever trains a dog should have experience.

Veteran trainers offer a great deal of love and discipline to whatever dogs they train.