Lorenzo has 46-cent stamps and 20-cent stamps. He needs to use stamps totaling at least $3.00 to mail a package. 
There is enough room for up to 9 stamps on the package. 
This situation can be represented by the following system of inequalities, where x= number of 46-cent stamps and y= number of 20-cent stamps. 
{x+y≤ 9 
{46x+20y≥ 300. 
Which of the following is a true statement? 
A. Lorenzo can use four 46-cent stamps and six 20-cent stamps. 
B. Lorenzo can use five 46-cent stamps and four 20-cent stamps. 
C. If Lorenzo uses six 46-cent stamps, he only needs to use one 20-cent