If you wanted to quote from page 42 of a book by Jon Krakauer about an ill-fated attempt to climb Mount Everest (titled Into Thin Air) for a research paper, which would be the correct way to cite this source using MLA documentation?

Responses
A (Krakauer 42).(Krakauer 42).
B (Krakauer 27).(Krakauer 27).
C Krakauer, 42).Krakauer, 42).
D (Krakauer page 42).

A (Krakauer 42).

The correct way to cite this source using MLA documentation would be option A: (Krakauer 42).