Which equation can be used to find the answer?

christina climbs to the top of mount graham in arizona. on the first day, she climbs to an elevation of 1029 ft. the elevation of mount graham is 10,724 ft. how many total feet of mount graham’s elevation does christina climb on the other days?
a. e + 1029 = 10,724
e = 9695
9695 ft

b. e = 1029 · 2
e = 2058
2058 ft

c. e = 10,724 ÷ 2
e = 5362
5362 ft

d. e – 1029 = 10,724
e = 11,753
11,753 ft