Afull stretching session should take between a. five and ten minutes b. half an hour to an hour c. one and two hours d. ten and twenty minutes i can't decide between the first and the last choices. !

Why do you think those who can’ t afford high quality medical care would be affected the most

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine. what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Which food preservation method can people use at home? a. fermentation b. irradiation c. pasteurization d. thermal processing