*$_$$\eqalign{ & \frac{{{a^2} - {b^2} - 2bc - {c^2}}}{{{a^2} - {b^2} + 2ab - {c^2}}} \cr & {\text{is equivalent to = ?}} \cr} $$?

• A. (a -b + c)/(a + b + c)
• B. (a - b - c)/(a - b + c)
• C. (a - b - c)/(a + b - c)
• D. (a + b + c)/(a - b + c)