Which sentence has correct capitalization?
A.
Frida Kahlo, a mexican painter, was born on july 6, 1907.
B.
Frida Kahlo, a Mexican Painter, was born on July 6, 1907.
C.
Frida Kahlo, a Mexican painter, was born on July 6, 1907.
D.
Frida Kahlo, a mexican painter, was born on July 6, 1907.