An object covers two consecutive equal distances with speeds v1 and v2. The average speed of the object is:

• A. \({V1 + V2 \over 2}\)
• B. \( {V1V2 \over 2(V1 + V2)}\)
• C. \({V1V2\over (V1 + V2)}\)
• D. \({2V1V2 \over (V1 + V2)}\)