Which statement best explains why the penny does not move in the same direction as the card?

(item #nf407555)
a. there is an absence of friction between the penny and the card.
b. there is a little gravity between the card and the penny.
c. the card exerts too much force on the penny.
d. the penny has more inertia than the card.

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .