Answer:
C) run-on sentence
Explanation:
How to correct a run-on:
(using a period):
Students were angry. They felt teachers did not consider that students had vacation and family plans for the holidays.
(using a semi-colon):
Students were angry; they felt teachers did not consider that students had vacation and family plans for the holidays.
(using a coordinating conjunction):
Students were angry, for they felt teachers did not consider that students had vacation and family plans for the holidays.
(using a subordinating conjunction):
Students were angry because they felt teachers did not consider that students had vacation and family plans for the holidays.
