Grant is sitting in his high chair calling to his dog, "Here Dog." He then turns to his mother and says, "Want juice." Grant is exhibiting

The composition of breast milk adjusts to the age of the baby

Indicate whether this statement is true or false.

A researcher who flips a coin to determine in which treatment group participants will be assigned is using

A) a confounding variable. B) matching. C) a natural, or quasi-, experiment. D) random assignment.