Train service suffers when a railroad combines commuter and freight service. By dividing its attention between its fr...

Why must the negation of E be "never" instead of "railroad commuters often want..." I get that never contradicts rarely, but that isn't the same thing as negating it, and I chose E thinking that if commuters often wanted freight services, then this would undermine the premise that freight services and commuters divides the railroad's attention. Thanks!