What is the ground-state electron configuration of calcium \((Z=20)\) ?

A. \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{8}\)

B. \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1} 4 p^{1}\)

C. \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}\)

D. \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 p^{2}\)