Atotal of 30 percent of the geese included in a certain migration study were male. if some of the geese migrated during the study and 20 percent of the migrating geese were male, what was the ratio of the migration rate for the male geese to the migration rate for the female geese?

a. 1/4 b. 7/12 c. 2/3 d. 7/8 e. 8/7