Which question is least likely to lead to a biased answer in a survey?

(a) do you think children eat too much sugar?
(b) how disappointed are you with the current mayor?
(c) what is your favorite drink?
(d) should dog owners who want their dogs to be healthy feed them acme dog food?

The symbols found on the map below indicate where fossils have been found in the same layer of sediment. each unique symbol represents fossil locations of a particular species.

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

Why did the united states want to remain neutral and how did it become involved in world war ii?