The correct answer is D. A prepositional phrase means that it starts with a preposition. And in these examples, D is the only one that starts with a preposition "on".
Answer:
Even though she was frightened, she decided to walk in and check out what is on the inside. She carefully opened the door, and take a quick glance on the insides of the house. A small, thin trail of blood was leading though a nice, clean house, wich, as appeared, nobody inhabited. She looked around the first floor, wondering where did the scream of agony came from, until she saw the same thin trail of blood leading up the stairs.......
Explanation:
no explanation
Surprisingly, his hands and feet are bigger than normal, which helps him move quickly through the water.