Velocity of a particle moving along a straight line varies with time as shown in the adjacent figure. Net forces acting on the particle are $$F_1,F_2,F_3,F_4$$ and $$F_5$$ in the intervals OA, AB, BC, CD and DE respectively. Identify the correct statement.

A

$$F_1$$ increases with time.

B

$$F_5$$ is initially positive and then becomes negative.

C

$$F_1$$ and $$F_2$$ are in opposite directions.

D

$$F_3$$ is negative.