Identify Systems That Do Not Have Exactly One Ordered-Pair Solution $$\begin{array} { l } x + 6 y = 3 \\5 x + 30 y = 15\end{array}$$

Multiple Choice

Identify Systems That Do Not Have Exactly One Ordered-Pair Solution
- $$\begin{array} { l } x + 6 y = 3 \\5 x + 30 y = 15\end{array}$$

A) $\{ ( 3,0 ) \}$
B) $\{ ( 0,0 ) \}$
C) $\{ ( x , y ) \mid x + 6 y = 3 \}$
D) $\varnothing$