After an avalanche, a huge block of stone slid down a mountain and landed in the middle of the road. People in the nearby town had a very difficult time moving it out of the road. The block of stone is difficult to move because

A. It has a high amount of momentum.
B. Has balanced forces acting on it.
C. It has a high amount of inertia.
D. Has unbalanced forcing acting on it.
Is the answer B?
Thank you

I don't think so. Probably C fits better.

No, the answer is not B. The correct answer is C. The block of stone is difficult to move because it has a high amount of inertia. Inertia is the tendency of an object to resist changes in its motion. In this case, since the stone is large and heavy, it resists being moved due to its inertia. To move the block of stone, a significant amount of force would need to be applied to overcome its inertia.