Answer:
1, 2, 3
heres more information:
Rehearse, rehearse, rehearse (always aloud) ...
Memorise your opening line. ..
Practise your speech from written notes. ...
Practise presentation flow. ...
The power of silence. ...
Have a backup. ...
Arrive early. ...
Use physical props for a demo.
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Hope this helps you!
Pretty sure it would be B: Susan has gone back to school to study computer science.
You need to find that your self