D. Try to choose the correct answer, note that four wrong answers will cancel one correct answer (i.e. each wrong answer will be penalized by -1 pt.): [ 4 pts. ] According to Descartes' rule, which one of the following is the maximum number of i* values for the cash flow sequence shown below? Year Net Cash Flow(S) Cumulative Cash Flow (S) 0 +16,000 +16,000 1 -32,000 -16,000 2 -25,000 -41,000 3 +50.000 +9,000 4 +8,000 +1,000 Select one: a. 2 b. 3 c. 5 d. 4