Why Is It That 22 Weeks Is Considered the Earliest

Multiple Choice

Why is it that 22 weeks is considered the earliest "age of viability" for an unborn child?

A) ​Because this is the age by which the child's systems are functioning well enough to potentially sustain life outside of the mother's body.
B) ​Because it is not until this age that the unborn child's brain begins developing.
C) ​Because this is the age when the child's sex is determined, and when appropriate genitals begin to form.
D) ​Because this is the age after which teratogens can no longer impact the baby.