How does this action cause the skateboarders speed to decrease?

Pls help

B. It increases the force of friction.

Explanation:

When the leg is being dragged with the girl while she is riding the skateboard, there is more contact surface area to the ground compared to when the leg was on the board so the force of friction between the girl & skateboard and the ground increases, causing her speed to decrease.

i had the same answer and put c. deflect randomly in multiple directions.   i looked it up on google and what i found was this;

scattering of light: by small particles and molecules in the atmosphere. different from reflection, where radiation is deflected in one direction, some particles and molecules found in the atmosphere have the ability to scatter solar radiation in all directions.

i know it's kinda annoying when you are just given a google article but this is why i think it is c.   i will try to let you know if i got it right.