Which of the following is most likely to result from an increase in the dividend tax credit? a) An increase in prices of Canadian dividend-paying shares because they will have a lower effective rate rate which makes them more attractive investments. Ob) A decrease in income of all the retired Canadians who own preferred shares. Oc) A decline in unit price of mutual funds that focus on investing in preferred shares. d) An increase in the proportion of total Canadian taxes that are paid from investment income