Answer:
b. adult literacy; infant mortality
Step-by-step explanation:
Multiple choice "life expectancy; internet usage ; adult literacy; infant mortality ; infant mortality; adult literacy ; access to clean water; life expectancy"
Higher real GDP per capita would imply higher literacy rate and at the same time lower infant mortality as citizens would invest more in health and education. All the other options are wrong as higher real GDP per capita cannot lead to lower life expectancy or literacy rate.