What is the correct definition of "linear distance"?
a. how long someone perceives it takes for something to take place or for a goal to be met
b. how far people, products, and ideas travel throughout the world measured in feet, yards, or miles
c. how long it takes for people, products, and ideas to travel throughout the world measured in hours, days, or weeks
d. how long it takes for someone to travel from their home country to their new location