The population of Bigville increased from 387,480 to 571,533 in the last 7 years. During the same time period, Smallville increased its population by 53.67%. Which town is growing at the greatest rate and by what factor? (round to nearest hundredth) A) Bigville by a factor of 1.13 B) Bigville by a factor of 6.17 C) Smallville by a factor of 1.13 D) Smallville by a factor of 6.17