How Is the Definition of "Child" Different from That of "Infant

How is the definition of "child" different from that of "infant?"

A) Infancy is defined as the first two years of life,whereas childhood lasts from birth until puberty
B) Infancy lasts until age 2,whereas childhood lasts until age 5
C) Infancy is defined by a lack of complex speech,whereas childhood is defined as the presence of complex speech
D) The definition of child and infant are the same