i think i exhausted myself with that baguio climb and long run . i lost i think three kilos in over a week and it 's not nice . i 'll find time later . i 'll be out on the track later .

Choices:
a). They have n't been taking in the correct amount of calories ..
b). They have been trying to reach their goals too quickly ..
c). None of the above choices ..
d). They are not physically capable of working out ..
Q: Why might the narrator have exhausted themselves ?
b).