Choose the Letter of the Best Match from the Following

Multiple Choice

Choose the letter of the best match from the following definitions of positive feedback to their proper examples in child birth.
-Stimulus

A) oxytocin causes increased uterine contractions
B) pituitary gland secretes oxytocin
C) fetus pushed against uterine opening
D) receptors in uterus detect stretch
E) brain receives and compares stretch information