What are the vertex and x-intercepts of the graph of the function below?

y=x^2-6x-7

A. Vertex: (3, -16); Intercepts: x= -1, 7

B. Vertex: (3, -2); Intercepts: x= 1, -7

C. Vertex: (3, -2); Intercepts: x= -1, 7

D. Vertex: (3, -16); Intercepts: x= 1, -7