Ben, age 67, and karla, age 58, have two children who live with them and for whom they provide total support. their daughter is 21 years old, blind, is not a full-time student and has no income. her twin brother is 21 years old, has good sight, is a full-time student and has income of $4,800. which of the following statements is correct regarding ben and karla's ability to claim the twins as dependents? a) the couple can only claim the son as a dependent. b) the couple cannot claim either twin as a dependent. c) the couple can only claim the daughter as a dependent. d) the couple can claim both twins as dependents