Pls Help! Need this ASAP! Determine whether the following relation is a function.

{(3,7),(3,8),(3,-2),(3,4),(3,1)}

A. It is a function because the ordered pairs all have the same x-value.
B. It is not a function because there are multiple y-values paired with a single x-value.
C. It is a function because none of the ordered pairs have the same y-value.
D. It is not a function because none of the ordered pairs have the same y-value.