According to the writer, which one of the following is NOT true？
A. Division of labor can enable fewer people to make more pins.
B. Division of labor helps people to produce more of what they already have.
C. Division of labor is by no means responsible for economic growth.
Division of labor is an efficient way of organizing work.
What is the speaker doing？
A. Telling a story about a friend
B. Asking for contributions
C. Helping people find their seats
D. Introducing a speaker
What will be different for the next 90 days？
A. The cost of repair jobs
B. The cost of some filters
C. The time required for repairs
D. The time required for delivering parts
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