How many pieces can a square pizza be cut into by making 6 linear cuts?  Choose the correct answer
A) 20
B) 21
C) 22
D) 23
E) 24
1 cut makes 2 pieces   a second cut can make 4 pieces by cutting through both pieces   a third cut can make 7 pieces by cutting through 3 of the pieces   a fourth cut can make 11 pieces by cutting through 4 of the pieces   a fifth cut can make 16 pieces by cutting through 5 of the pieces   a sixth cut can make 22 pieces by cutting through 6 of the pieces   22
<result>C</result>
How many pieces can a square pizza be cut into by making 6 linear cuts?