Answer:
C. 32
Explanation:
Use the distance formula.
Distance:

y₂=(-7)
y₁=(-3)
x₂=4
x₁=8

Solve.
Use the order of operations.
PEMDAS stands for:
- Parentheses
- Exponents
- Multiply
- Divide
- Add
- Subtract
Do parentheses first.
(4-8)=-4

-7-(-3)=-7+3
-7+3=-4

Do exponents.

Then, you add.
16+16

Therefore, the correct answer is C. 32.