Why is it recommended that pregnant women meet the rda of 27 milligrams of iron per day? a. to ensure the baby receives adequate iron b. to reduce risk of too much blood loss during labor c. to increase the chance that the pregnancy will go full term d. to control gene expression

[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.

Why girls are tan and why they fake tan

Jason pressures emmanuel to be a gang member. which choice is the best way emmanuel can respond? tell jason he is not interested in joining. ignore jason and brush off what he says. lighten the mood by changing the subject. keep quiet and continue listening to jason.