What is the vertex form of the quadratic function that has a vertex at (4,3) and goes through the point (5, 1)?
A. y= 2(x - 4)^2 +3
B. y = 4(x-4)^2 - 3
C. y=-2(x - 4)^2 + 3
D. y = (x-4)^2 +3