Including Jose, there are eight people in his family.If order matters, how many ways can he arrange his family members into a row of five seats if Jose must sit in the first seat?

Jose is fixed in the first seat, so there are 7 family members left to fill the other 4 seats. Since order matters, the number of arrangements is 7 × 6 × 5 × 4 = 840. The correct choice is 840.

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