40 pts: which of these is a feature of audible pedestrian crosswalk signals? a. emergency instructions b. responses to voice commands c. button location signaling d. pedestrian tracking

C) button location signaling is a eature of audible pedestrian crosswalk signals.

Explanation:

To understand this answer we need to analyze all of them.

a) emergency instructions are incorrect because we don't know if they are written. To be correct they should be audible emergency instructions. But we are not talking about emergency instructions but of crosswalk regular signals.

b) responses to voice commands. This could be good however in this case we don't know if the responses are audible. It just says responses, they could have a microphone that let them respond to voice commands but not a speaker to provide an audible response. So is wrong.

c) button location signaling is the correct answer because there are plenty of crosswalk signals that provide audible signals by pushing a button. To generate it, we just push the button and the signal is emitted after the response time.

d) Pedestrian tracking could be a nice option if the crosswalk emitted an audible signal due to the reaction to the pedestrian tracking but they are used for security instead of crosswalk signaling.

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