Use the passage to answer the question.
For what purpose does the author include the sentence about using the centrifuge as a doorstop?
(1 point)
Responses
to show a negative opinion of centrifuges
to show a negative opinion of centrifuges
to criticize the inventor’s waste of time
to criticize the inventor’s waste of time
to indicate a positive opinion of recycling
to indicate a positive opinion of recycling
to highlight a problem with a current system