The following question refers to "Taste - The Final Frontier." "What input have astronauts had in the most recent experiments on space food?" is a more useful research question than "Has space food ...
... changed since the 1960s?" because
it is a broad, general question about growing food on Mars.
it will yield specific information.
it can be answered yes or no.
it is about future events.
A. it is a broad, general question about growing food on Mars.
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