A dolphin was swimming 6 feet below sea level. The number line shows the location of the dolphin. It then swam up 4 feet. Describe how to use the number line to find the new location of the dolphin. -10 9 8 7 6 5 4 3 2 -1 0 1 2 3 4 5 6 7 8 9 10 O A. On the number line, move 4 units to the right End at -2. The dolphin was 2 feet below sea level. B. On the number line, move 4 units to the left. End at 2. The dolphin was 2 feet above sea level. O C. On the number line, move 4 units to the right. End at 10. The dolphin was 10 feet above sea level. D. On the number line, move 4 units to the left. End at -10. The dolphin was 10 feet below sea level. no links