Radon-222 Has a Half-Life of 3

Radon-222 has a half-life of 3.82 days. How many alpha emissions would have occurred when a 10 g of radon-222 sample decays over 19.1 days?

A) 3.39 × 10²⁰ emissions
B) 8.47 × 10²⁰ emissions
C) 5.42 × 10²¹ emissions
D) 2.62 × 10²² emissions
E) 4.18 × 10²⁵ emissions