Because we know that stress affects immune system functioning, it has allowed scientists to understand better how stress might be associated with which of the following causes of death?

Compared with unattractive children, attractive children are ______ positive toward other people and ______ adjusted

a. less; less well b. more; less well c. less; better d. more; better

Developing countries are faced with difficult challenges in the decades ahead due to the rising old-age dependency ratio. The country with the most serious problem of all is ________

a. China b. Japan c. South Africa d. Australia