Which of the following is true? a. younger athlete will beat an older one. b: athletic performance peaks in both men and women between ages of 20 to 30. c: on average, woman’s athletic ability will peak a later age than man’s will. d: people over 40 should not exercise strenuously.

The purity of ecstasy is always in question, why? (short answer)

[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.

Describe in your own words three purposes of human services.