What Is the Total Mass of the Earth's Atmosphere? the Radius

Multiple Choice

What is the total mass of the Earth's atmosphere? The radius of the Earth is 6.4 *106 m, and 1 ATM = 1.01 * 105 N/m².

A) 5.3 *1016 kg
B) 1.1 * 1018 kg
C) 5.3 *1018 kg
D) 1.1 * 1020 kg
E) 5.3 * 109 kg