Ca n't be sure about that , though . One step at a time ... " Andy watched , fascinated , and did n't interrupt again . Castin worked with his laptop battery and the elevator 's wiring , cursing a lot as he went .
Why did Andy watch ?
Pick the best answer from the following options:
- He was fascinated .
 - He was curious about all the cussing .
 - Because Castin worked with his laptop .
 - Because of the elevator 's wiring .


He was fascinated .