[USMA:12298] RE: Who wants to be a millionaire metric question

[mojo]

>What is the only unit of measurement for length approved by the US Congress 
since 1867?
>
>A:inch;
>B:foot;
>C:yard;
>D:meter

I'm not sure this question makes any sense in a common law (vs civil law) 
context. I believe the law actually states that no contract can be considered 
invalid for the sole reason that it uses metric units. Inches, feet, and yards 
are all "approved" by their common acceptance, by the precedent of their 
acceptable use in contracts.