100 points answer fast

which of the following is an example of speed?

a. a truck driving 15 miles per hour south.

b. a cat running 5 meters per minute.

c. a bicyclist ridding 12 miles per hour east.

d. a plane traveling at 15 miles

The answer is A because it has the most amount of speed, the plane has the same speed but doesn't tell you for what amount of time is the speed so what if the plane traveled 15 per 2 hours or 3 obviously the truck is going faster and it if said 15 miles per minute then it would obviously be the plane but since it doesn't specify then the truck would be you rmost likely answer

Hope this helps