Ideally, before having sex, teenagers would discuss the risks of pregnancy and STIs, but in reality only about ______ of them have these discussions

What is another name for a proband?

a. carrier b. index case c. identical twin d. fraternal twin

Individuals who exhibit the characteristic of _____ generally have an expectation that things will turn out well

a) optimism b) hardiness c) Type A behavior pattern d) pessimism