Radon-222 has a half-life of \(3.8\) days. If one starts with \(0.064 \mathrm{~kg}\) of Radon-222, the quantity of Radon-222 left aft er 19 days will be
(A) \(0.002 \mathrm{~kg}\)
(B) \(0.062 \mathrm{~kg}\)
(C) \(0.032 \mathrm{~kg}\)
(D) \(0.024 \mathrm{~kg}\)