Which explanation best describes how to solve this problem? hector made 120 cheese sandwiches and 160 ham sandwiches that he placed on 20 platters. he put the same number of sandwiches on each platter. how many sandwiches did hector put on each platter? a. divide 120 by 20 and add 160. b. multiply 120 by 20 and subtract 170. c. add 120 and 160 together and subtract 20. d. add 120 and 160 together and divide by 20.