What is an example of a positive incentive for someone to use stairs when an elevator is available? a) For someone in a bad mood, using the stairs is a way to avoid unwanted conversations. O b) The elevator is rumored to be poorly maintained and unsafe. Oc) Using the stairs is faster than waiting for the elevator to show up. O d) Using the stairs will increase the risk of tripping and falling. O e) The elevator tends to be crowded, and passengers are often rude.

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