Vitamins A, B-12, C, D, iron, and zinc are ______

The circular reaction

A) involves stumbling onto a new experience caused by the baby's own motor activity. B) centers on internal depictions of events. C) relies on the baby's familiarity preference. D) is "circular" because each new reflex is followed by another new reflex.

For maximum protection from pregnancy, partners using condoms should

A) never carry the condom in a pants pocket or wallet. B) combine condom use with a spermicide. C) never open the condom package until ready to use. D) never use a scissors or teeth to open a condom package.