From the diagram given below, if area of triangle ABC is ar (ABD) and area of triangle ACD is ar (ACD), then what is the relation between ar (ABD) and ar (ACD)?

• A. ar (ABD) = 0.5ar (ACD)
• B. ar (ABC) = 4ar (ACD)
• C. ar (ABD) = 2ar (ACD)
• D. ar (ABD) = ar (ACD)