Given the task definition and input, reply with output. In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

A higher barometer reading means (A) lower air pressure in the atmosphere (B) an atmosphere lacking in air pressure (C) greater air pressure in the atmosphere (D) that the barometer is broken
C