How do sociologists ensure the validity of their research findings? a. they replicate studies multiple times. b. they avoid using concepts at all because they are too abstract. c. they use more than one indicator for a particular concept. d. they stick to a single indicator for a particular concept in order to avoid confusion?

How has the money from oil production in the middle east not impacted the people of that region? a) it improved education and jobs in the region. b) it improved infrastructure such as ports, roads, and bridges. c) it increased life expectancy due to improved healthcare facilities. d) it increased political stability and lessened the presence of corruption.