Determine the MINIMUM size NM cable the NEC requires for branch circuit conductors, supplying a 10Kw 240 volt, single phase, residential electric range.

The provided answers in the back of the book suggests 220.55 Column B 80% to reduce the kw to 8000 Kw, then size the wire.

My question is, if Column B is for (3.5kw through 8.75 kw Rating) why choose this column when the electric range is 10,000? Thanks!!!