The correct option is A Skeletal
Tendons connect the skeletal system to the muscular system by attaching muscle to bone. When muscle contracts, the tendon acts on the bone, causing movement. Joints, the point at which two or more bones connect, can be fixed, slightly movable, or freely movable. So, in addition to muscular system, vertebrates have evolved skeletal system for faster locomotion.
So, the correct option is option B.