In Δ ABC, AD is the bisector of ∠A and intersects BC at D. If BC = a, AC = b and AB = c, then BD is equal to:

• A. \(\frac{{a(c + b)}}{{c - b}}\)
• B. \(\frac{{ab}}{{b + c}}\)
• C. \(\frac{{a(c - b)}}{{c + b}}\)
• D. \(\frac{{ac}}{{b + c}}\)