Which of the following describes volume?

a. amount of mass contained in a certain space

b. the amount of space that matter occupies

c. how fast the particles of matter are moving

d. the number of particles or amount of matter

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?