Which situation involves a change modeled by a negative number but an end result modeled by a positive number?

a. jake started his hike at an elevation of 23 meters, traveled down the mountain and stopped at an elevation of –2 meters.

b. marissa had $64 in her savings account. she then withdrew $20 to buy some sandals.

c. lorelei owed her mother $15. she then got $10 in a birthday card from her grandmother.

d. javier was scuba diving and swam up 6 meters from the ocean floor to sea level to reach his boat.