At what stage does motor development become much smoother and more coordinated?

A) Infancy
B) Early childhood
C) Childhood
D) Adolescence

C
Explanation: C) During childhood, children become slimmer as "baby fat" begins to decrease, and muscle mass and strength steadily increases. Motor development become much smoother and more coordinated because of improved myelination of the central nervous system, enabling children to use their hands more dexterously for fine motor skills such as handwriting, producing arts and crafts, and playing instruments.