Considering a rare X-linked recessive trait, which of the statements is/are true? Select all that apply. a. An unaffected woman whose father was affected is expected to have unaffected sons. b. An affected father is expected to have affected daughters. c. An affected mother is expected to have affected sons. d. Both parents have to be affected in order to have affected daughters. e. An unaffected father is expected to have unaffected daughters.