Read the short passage below.

Leila sent the revised schedule to the teachers. They noticed that it still listed the old workshop date. This error forced her to issue a second version before the afternoon meeting.

The cohesive interpretation of the passage depends on correctly identifying several referential relationships.

Analyze the statements below.

I."They" refers to "the teachers."
II."It" refers to "the revised schedule."
III."This error" refers to Leila's decision to issue a second version.
IV."Her" refers to Leila.

It is CORRECT what is stated in: