Answer quick Alex went for a walk.
D(t) models the distance Alek walked (in kilometers) after t hours.
What does the statement D(0.5) < D(1) - D(0.5) mean?

(Choice A)
A
The time it took Alek to walk the first half kilometer is shorter than the time it took him to walk the following half kilometer.

(Choice B)
B
The distance Alek has walked after walking for an hour is greater than the distance he has walked after half an hour.

(Choice C)
C
The distance Alek walked during the first half hour is shorter than the distance he walked during the following half hour.