I believe it is viral, they can not be treated with antibiotics but can be prevents with vaccines.
Answer:
true
there's always a way to convince someone using words
violence is often the last resort for something
Increasing vida in d leves within the body you need the vitamin
Answer:
b. ex post facto or quasi-experimental.
Explanation:
An ex post facto search is done when a researcher cannot manipulate one of the variables such as sexual behavior or smoking (as described in the question), ie this type of research is done when it is not possible to manipulate the independent variables as they already arrive ready for research. Ex-post fact research deals with variables that are unmanipulated in nature. Quasi-experimental research can also be done for this same situation.
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