The workshop was attended by Emily, and Elena was the speaker, because 
OPTIONS:
- Emily is a student.
- Elena is a student.
Emily is a student.

The air purifier will not fit through the doorway because the 
OPTIONS:
- air purifier is too slim.
- doorway is too slim.
doorway is too slim.

To treat her dry hair naturally, Amanda wanted to try the conditioner instead of the shampoo because the 
OPTIONS:
- conditioner was organic.
- shampoo was organic.
conditioner was organic.