If cos α + cos β + cos γ = 0, where \(0 < {\rm{\alpha }} \le \frac{{\rm{\pi }}}{2},0 < {\rm{\beta }} \le \frac{{\rm{\pi }}}{2}\:\&\: 0 < {\rm{\gamma }} \le \frac{{\rm{\pi }}}{2}\) sin α + sin β + sin γ?

• A. 0
• B. 3
• C. \(\frac{{5\sqrt 2 }}{2}\)
• D. \(\frac{{3\sqrt 2 }}{2}\)