After listening to a long discussion on the skeletal system, you conclude that the skeletal system is important because it a. supports the body and makes red and white blood cells b. is formed from bones, cartilage, and muscle c. provides the body with potassium needed for support d. manufactures the ligaments needed to connect bones

Explanation:

Option A is the best answer, because it's more complete about the skeletal system.

The skeletal system is more complicated that we think, comprehend all bones system, having 206 bones as total. Also, this system have as function to produce blood cells, storing and releasing fats and minerals.

The human skeleton isn't just bones, also involves tendons, cartilages and ligaments, to maintain bones together. Let's take the toe as an example, most people think that the toe has only two or three bones, but the fact is, it has several tiny bones, forming a system, to other bones connecting with other several bones, until forming a complex structure. Imagine this in each part of our body, that's why it's said the skeletal system supports the body.