Class B would be the correct answer.
Explanation:
People have feelings and emotions because evolved emotions as ways of helping us to rapidly reorganise our mental and bodily resources to help us prepare for anything the world might throw at us. During our lives, each of us experiences millions of emotional reactions either consciously or unconsciously.
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Edits in the document are called, C. Track changes
Your answer would be D, graphical user interface. Hope this helps!
