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SAS: macro var in macro call

I have a SAS macro

%macro corr(A, B, C);
....
%mend corr;

C is a macro variable.

% let c=
name
location
;

When I call macro corr, what should I do for c?

%corr(varA, varB, &varC.)?
%macro corr(A, B, C);
%put &C;
%mend corr;

%let c= name location;

%corr(varA, varB, &C.);

in the log, you can see "name location"

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