The answer is going to be A. Experimentation.
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The word glossophobia originates from the Greek γλῶσσα glōssa, meaning tongue, and φόβος photos, fear or dread. Glossophobia or speech anxiety is the fear of public speaking. Some people have this detailed phobia, while others may also have the broader social phobia or social anxiety disorder. The answer is an example of Speech Anxiety.
Multiple choice? Can't see any options here.