Read the following sentence:
All students who are not registered will be sent to the back of the elective course line.
Identify the relative clause, whether it is essential to the meaning of the sentence, and if it requires commas.
The clause is "to the back of the elective course line."
OIt is non-essential.
It does require a comma.
The clause is "to the back of the elective course line."
OIt is essential.
It does not require a comma.
The clause is "who are not registered."
It does require a comma.
The clause is "who are not registered."
It is essential.
It does not require a comma.
O It is non-essential.