Why are cancer-causing factors in lifestyle or the environment difficult to identify?

List the 4 steps for scene assessment (what you do at the very beginning) for an adult

Many factors influence your mental and emotional health

*edit* i took the test and i picked a and it was incorrect for its c! rank the following suggestions for preventing std, in order of increasing effectiveness. 1) using latex condoms properly 2) using spermicidal foam or jelly with a monogamous partner 3) abstaining from sexual intercourse and genital contact a. 1, 2, 3c. 2, 1, 3