Which sentence uses an appropriate transition to show causes and effects among events?
A-Students must schedule an appointment with an advisor and they can choose their classes for next semester.
B- Students must schedule an appointment with an advisor when they can choose their classes for next semester.
C-Students must schedule an appointment with an advisor until they can choose their classes for next semester.
D- Students must schedule an appointment with an advisor so that they can choose their classes for next semester.
