f Maria gets 80 utils from consuming five cookies, 100 utils from consuming six cookies and 120 utils from consuming…
f Maria gets 80 utils from consuming five cookies, 100 utils from consuming six cookies and 120 utils from consuming seven cookies, then Mariaʹs marginal utility from the sixth cookie is: 25) ______
A) 100 utils. B) 80 utils. C) 40 utils. D) 20 utils.