Buying a car is an example of a A: primary reinforcer
B. progressive reinforcer
C. secondary reinforcer
D. classical reinforcer

According to your text, the best way to reduce the number of germs is by ventilating spaces and a. cleaning all toys, books, and materials every day. b. keeping all potentially sick individuals out of the center. c. minimizing strenuous physical activity among the children. d. cleaning, sanitizing, and disinfecting surfaces and materials.

Based on the chart, what are the three most effective methods to protect against pregnancy?

Which form of birth control good people use without altering hormonal systems are blocking sperm from fertilizing an egg