Read the sentence.

The gym teacher taught her students how to check their pulse by _[blank]_.

Which additional detail could be added to help a reader figure out what the word pulse means in the sentence?

Responses

asking us to write down their results
asking us to write down their results

showing a video
showing a video

demonstrating how to count the beats on their wrists
demonstrating how to count the beats on their wrists

giving a lecture and a handout on how the body works
giving a lecture and a handout on how the body works