The Nurse Explains That the Usual Location for Implantation of the Zygote

The nurse explains that the usual location for implantation of the zygote is the:

A) upper section of the posterior uterine wall.
B) lower portion of the uterus near the cervical os.
C) inner third of the fallopian tube near the uterus.
D) lateral aspect of the uterine wall.