Isabella's Utility Function Is U(x, Y)= 4min{x, Y} + Y

Isabella's utility function is U(x, y) = 4min{x, y} + y.If we draw her indifference curves with x on the horizontal axis and y on the vertical axis, these indifference curves are

A) L-shaped with kinks where x = y.
B) made up of two line segments that meet where x = y.One of these line segments is horizontal and the other has slope -4.
C) L-shaped with kinks where x = 5y.
D) made up of two line segments that meet where x = 5y.One of these line segments is vertical and the other has slope -1.
E) V-shaped with kinks where x =4y.