Table 7-1 Keegan Has $30 to Spend on Pita Wraps and Bubble

Table 7-1
$$\begin{array} { | c | c | c | c | } \hline \begin{array} { c } \text { Quantity of } \\\text { Pita Wraps }\end{array} & \text { Total Utility } & \begin{array} { c } \text { Quantity of } \\\text { Bubble Tea }\end{array} & \text { Total Utility } \\\hline 1 & 60 & 1 & 40 \\\hline 2 & 102 & 2 & 70 \\\hline 3 & 132 & 3 & 91 \\\hline 4 & 144 & 4 & 106 \\\hline 5 & 144 & 5 & 112 \\\hline 6 & 138 & 6 & 115 \\\hline 7 & 128 & 7 & 115 \\\hline\end{array}$$
Keegan has $30 to spend on Pita Wraps and Bubble Tea.The price of a Pita Wrap is $6 and the price of a glass of Bubble Tea is $3. Table 7-1 shows his total utility from different quantities of the two items.
-Refer to Table 7-1.If Keegan can drink all the bubble tea he wants for free,how many glasses will he consume?

A) 4 glasses
B) 5 glasses
C) 6 glasses
D) 7 glasses