Which sentence uses 'on the other hand' CORRECTLY to contrast two ideas in a paragraph about school start times?
A) School should start later; on the other hand, students might go to bed too late.
B) On the other hand school should start later students might go to bed too late.
C) School should start later on the other hand, students might go to bed too late.
D) On the other hand, school should start later, students might go to bed too late.