If you are caught in a building that is on fire which of the following is not the best option for evacuating the building? a. if the nearest exit is blocked by fire, run through it quickly. b. if the nearest exit is blocked by fire, use an alternate exit route. c. if you must exit through smoke, stay low to the ground and get out as quickly and safely as possible. d. proceed to the nearest fire exit.

[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.