Find the area of the shaded portion in the figure given below in terms of AB and BC.

• A. \[4\text{ c}{{\text{m}}^{2}}-(\text{AB}\times \text{BC)}\]
• B. \[(\text{AB}\times \text{BC)}-4\text{ c}{{\text{m}}^{2}}\]
• C. \[(\text{AB}\times \text{BC)}+4\text{ c}{{\text{m}}^{2}}\]
• D. \[(\text{AB}\times \text{BC)}-8\text{ c}{{\text{m}}^{2}}\]
• E. None of these