What is displacement? a. the rate of change of distance of an object over time b. the specific speed and direction in which an object is moving c. the distance between two points and the time taken to travel that distance d. the shortest path between two points, including both distance and direction

The displacement from point A to point B is the length of the shortest path between them along with the direction from A to B.

Choice D

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)