Answer:
C
Explanation:
Substitute 6 for "x" in (x - 3)² + 1
(6 - 3)² + 1 
We now evaluate the expression using PEMDAS
Parenthesis 
Exponents 
Multiplication and division ( from left to right ) 
Addition and subtraction ( from left to right ) 
Step 1: parenthesis 
6 - 3 = 3
We would then have (3)² + 1
step 2: exponents 
3²=9
we would then have 9 + 1 which = 10 
Hence, the answer is C