John, as a third party conflict resolution participant, tells a joke at the beginning of a meeting with Jill and Anthony, who are in the process of a nasty fight over a work related issue. John is using which kind of tactic?

the answer is:

c. economic output

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.