Which one best describes comparlison shopping?
a. u are trying to decide if u should buy the size 5 levi shorts in white denim or blue denim.
b. u cannot decide between the quarter-pound burger with white cheese and all the toppings or the one with yellow cheese and all the toppings except pickles.
c. u cracked a wheel on your skateboard so u call up two different repair shops to see if they can fix it and how much it would cost.
d. u want to see the new movie coming out tonight so u check two different theaters to see which show times would work best for u.

What is one way in which an active listener can confirm understanding of a message?

Would you rather know how you die or when you die.i want a pretty good answer that makes sense.or ill report you.lol kidding

[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.