Which of the following is for self-evaluation?

A. asking questions about your attitudes, beliefs and values
B. asking others for information about yourself
C. examining your skills and abilities in comparison to others
D. all of the above
 
D. because all of the choices are signs of looking at your progress, development and learning to determine what has improved and what areas still need improvement. Usually involves comparing a "before" situation with a current situation.

The bell is just a signal that the set time of the end of class is passing. the teacher lets you know when it's okay to leave.

This is literary work