The route that a trolley takes around a city can be represented by the functions x2 + y2 = 10. A train track's path can be described by the function x + y = 4. At which location(s) will the trolley and train meet?

A) (–1, 3) and (–3, –1)
B) (3, 1) and (–3, –1)
C) (1, 3) and (3, 1)
D) (–3, 1) and (1, 3)