Identify Which Revision of the Following Sentence Has No Errors

Identify which revision of the following sentence has no errors in spelling or sound-alike words: Untill you hear otherwise, this scedule on the calandar is the one to follow in February.

A) Until you hear otherwise, this schedule on the calendar is the one to follow in February.
B) Until you hear otherwise, this schedule on the calandar is the one to follow in February.
C) Untill you here otherwise, this scedule on the calendar is the one to follow in February.
D) There are no errors.