Emily and Betsey are economists. Emily thinks that the wealthiest 10 percent of the U.S. population should be taxed a rate higher than the rest of society because they can better afford it. Betsey thinks that everyone should be taxed at the same rate because that is the fairest scenario and the wealthy should not be penalized for their success. In this example, Emily and Betsey a. disagree because they have access to contradicting positive statements. b. disagree about the validity of a positive theory. c. have different normative views about tax policy. d. must both be incorrect because tax policy is never that simple