Which would be an example of your emotional brain at work? O A. You write down the pros and cons of a purchase.
O B. You really like a person but you aren't sure why.
C. You decide to go camping because it is cheaper than a hotel.
D. You add up how much money you have and then decide how to
spend it.

[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.