If you ever gave a speech and forgot your remarks, not because you were unprepared but because you were afraid, saying "I know I’ll blow it," you experienced:a. changing self-conceptb. characteristics of self-conceptc. self-fulfilling prophecyd. social comparisone. feedback

Self prophecy

Explanation:

Self prophecy is a prediction. It causes because of its true due to the behavior of a person who believes in it. It is not about to guess anything but it is more than that of guessing things. Self prophecy comes from a person predicted it and put it forward. The predictor is biased because of their prediction and takes action results in right or wrong prediction happened. An everyday example can be a self-fulfilling example.  

Thus here in the above context, if someday you have forgotten your speech, not because you are not prepared but because of the afraid. You said that I will blow it. It is an experience of self prophecy.  

abu bakr, was a senior companion and—through his daughter aisha—a father-in-law of the islamic prophet muhammad. abu bakr became the first openly declared muslim outside muhammad's family. abu bakr served as a trusted advisor to muhammad.

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hope this , question was a little open ended