The function defined by f(x) = x^2 - x + 2/x+1 has the following stationary points: a. A maximum (turning point) at x = 1 and a maximum (turning point) at x = -3. b. A maximum at x = 1 and a minimum at x=-3. c. A minimum at x=-1 and a minimum at x = 3. d. A minimum at x = 1 and a minimum at x=-3. e. A minimum at x = 1 and a maximum at x=-3.