Why where 1960 race riots more violent in the north cities compared to the south

All of the following are reasons why people wanted the u.s. government to acquire hawaii except which one? a. it was an ideal location for a ship refueling station or permanent naval base. b. many americans knew it would be an ideal place to vacation. c. it was an ideal location for a lucrative sugar production industry. d. many missionaries hoped to convert the large native population to christianity.