HOW does the author introduce the idea that it took a while for the 1918 flu pandemic to become deadly? A

by citing statistics about how many people were killed by the flu virus

B

by describing the different places where the flu virus first appeared

C

by comparing what happened in the two waves of the flu virus

D

by explaining how the death toll went up when healthy young people died from the flu virus

How do i use this to get the right answer

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?

Aresearcher conducts a focus group to learn about attitudes towards hygiene and disease prevention. two weeks after the focus group, the researcher learns one of the subjects had a heart attack at home and was hospitalized, but made a full recovery. based on dhs regulations, the researcher report this event to the irb? no, this does not need to be reported since the subject had the heart attack when they were home, not at the focus group.no, this does not need to be reported since it is unrelated to participation in the study.no, this does not need to be reported because two weeks have passed.no, this does not need to be reported since the subject recovered.