What effect do mental models have on the decision-making process?

(a) they people to be more creative in decision making.
(b) they allow decision makers to obtain accurate information from the surroundings.
(c) they allow decision makers to maximize the potential of their decision making.
(d) they adversely influence evaluations that make it difficult to see new opportunities.
(e) they reduce the importance of developing alternative solutions to the problem.

Juan's investment portfolio was valued at $125,640 at the beginning of the year. during the year, juan received $603 in interest income and $298 in dividend income. juan also sold shares of stock and realized $1,459 in capital gains. juan's portfolio is valued at $142,608 at the end of the year. all income and realized gains were reinvested. no funds were contributed or withdrawn during the year. what is the amount of income juan must declare this year for income tax purposes?