The best means to avoid being infected by an std is: to abstain from sexual contact to abstain from drug use to get vaccinated to only engage in sexual contact when using protection

When you aggregate your data, you need to remember a. you'll use this data to parents understand your work. b. everyone should end up looking similar in their development. c. you're looking at the whole group rather than each individual. d. the big picture represents your instructional practices only.