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\label{Docs_Radio}
This is a question where students can choose only one correct answer
from a selection. Each choice in the selection is called a ``foil'' because
the majority of the selection choices try to foil the student. Only
one foil is correct. 

LON-CAPA randomly displays the foils to students. If you choose to set the max number of displayed foils to
4, but only have 6 foils, then LON-CAPA will choose one of the True
foils and fill in the rest of the foils with false foils, up to a maximum
of four foils. To edit the 1 out of N multiple choice problem, enter
your question text into the appropriate box. Then enter one foil statement
into each foil box you want to use. You do not have to use
all 10 of the foil boxes. For each foil you do use, you
need to assign it a value of True or False. 

You can choose to assign a foil
a location. For example, the foils appear in random
order to your students. If you have a foil statement of ``None
of the above'', then you want this statement to always appear
at the bottom. 

After entering all of the correct foil text, you can
add an optional hint. The hint text appears under the student's
view of the problem after getting one incorrect submission. The hint
text remains displayed on your students' views of the problem after
it is correct, for study purposes. 

At any point in the editing process,
you can choose to store your changes. Each time you click \fbox{Save and Edit}
, the current view of the problem will appear in box at the top of
the edit screen. When finished editing, click the \fbox{Save and Edit}
button and then the the \underline{Student view} link in the 
\textbf{Functions} section of the Inline Menu.