To check for consciousness: a) lift an eyelid to see if their pupils are dilated b) check their pulse c) tap the person and ask if they are okay d) listen for a heartbe

Tap the person and ask if they are okay (Option C )

Explanation:  

In order to check for consciousness, it basically involves examining a person to conclude if the person is conscious or unconscious. If the person is conscious then you could ask her/him that are you okay?

However, if the person is unconscious you need to check the pulse to check if the heart is beating or not.