One reason why feudalism became a popular form of government in Europe is
OA. it was a response to invasions by groups such as th Magyars.
B.
kings did not want to protect their subjects for free.
C. nobles needed to find ways to make better use of their land.
D. kings needed a way to raise an army without spending much money.

i a b is wrong it got my answer wrong :/

Explanation:

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.

many citizens are in danger of contracting a food-borne illness.

more people are living with chronic illnesses.

pathogens are becoming stronger and harder to defeat.

edge nuity