Answer:
C. (4, 3)
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS 
- Brackets 
 - Parenthesis 
 - Exponents 
 - Multiplication 
 - Division 
 - Addition 
 - Subtraction 
 
Algebra I
- Coordinates (x, y)
 - Midpoint Formula: 

 
Explanation:
Step 1: Define
Point (3, 1)
Point (5, 5)
Step 2: Find Midpoint
Simply plug in your coordinates into the midpoint formula to find midpoint
- Substitute in points [Midpoint Formula]: 

 - [Fraction] Add: 

 - [Fraction] Divide: 
