Is flock an abstract noun

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

Which of the following is characteristic of people from cultures with low humane orientation? a. they express greetings, welcome, concern and appreciation in most interactions. b. they are sensitive to all forms of unfairness c. they smile and display other nonverbal signs of welcome. d. they prioritize pleasure and self enjoyment over kindness and generosity.

Which of the following is a problem in the health care system of the united states? a. too many doctors in rural areas b. too many doctors who are general practitioners c. fraud d. costs that are too low