Because E might be mistaken for "Excellent". :')

Art
Laboratory for Environmental Biology, Centennial Museum
University of Texas at El Paso, El Paso, TX  79968-0915
[log in to unmask]   http://museum.utep.edu/
http://museum.utep.edu/chih/chihdes.htm

Gray, Peter wrote:
> "Only seven states... got an A, with 12 receiving a B, and 8 plus the District of Columbia receiving a C. Seven states got a D, and 15 got an F."
> 
> How come no-one gets an E?
> 
> Pete

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