To escape enslavement while on board slave ships, some Africans A. jumped overboard.
B. traded food.
C. attacked other Africans.
D. bribed sailors.

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.

answer; limbic system;