In which of these situations would the answer to the question be 0? *

A. Teddy jumped into a pool from a diving board 8 feet above the water. He sank 8 feet and then swam straight up to the surface of the water. How many feet did Teddy swim?
B. Jerry left his house and walked 1.5 miles directly west. Then he walked 1.5 miles directly east. At this point, how many miles was Jerry from his house?
C. A trail begins at an elevation of -50 feet. The trail ends at an elevation of 50 feet. By how many feet does the elevation of the trail change from beginning to end?
D. The low temperature one day was -3 degrees Celsius. The high temperature that day was 3 degrees Celsius. What is the difference between the low temperature and the high temperature that day?