I wanna say it’s D. Slower post exercise recovery time.
(a) 
The average acceleration of the ship is given by

where
v is the final velocity
u is the initial velocity
t is the time elapsed
Here we have:
is the initial velocity
v = 0 is the final velocity
is the time elapsed
Substituting, we find

(b) 4.72 m/s
Assuming the acceleration is uniform, the average velocity of the ship is given by:

where
v is the final velocity
u is the initial velocity
Here we have:
v = 0
u = 9.44 m/s
So the average velocity of the ship is

Being hot or not drinking enough fluids.
The next step is -748 divide by -11 is 68 m (answer) the pic got cropped sorry