Read the following context and choose the best option to answer the question.
Context: We ' ve all heard it before , and I ' m sure some of the other 2D 's felt a little bit of pride , but some of the new students got kind of hushed and worried looking . The teacher went about it in a very good way though . Apparently , Kota and I had Ed during his first semester he ever taught . We were n't aware of it then , because he was excellent .
Question: Why are Kota and the speaker surprised that it had been Ed 's first semester ever teaching ?
Options: 
- Ed had been the grandson of the former principal so they assumed he had been around longer
 - Ed seems far too old to have only just started teaching , and they are in disbelief
 - Ed did a marvelous job of teaching and they had assumed that he had more experience
 - Ed was the one that got them their jobs so they do n't understand how this can be the case


Ed did a marvelous job of teaching and they had assumed that he had more experience