Math 204-1 WW1 - Calculus for Business & Social Sciences E Homework: Assignment #2 Sec. 1.5 & 1.6 & 1.7 & 1.8 Question 13, 1.5.74 For the function, find the point(s) on the graph at which the tangent line is horizontal. y=x' - 4x2 +4x +8 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The point(s) at which the tangent line is horizontal is(are) (Simplify your answer. Type an ordered pair. Use a comma to separate answers as needed.) O B. The tangent line is horizontal at all points of the graph. O C. There are no points on the graph where the tangent line is horizontal. K