A firm has the production function f (x, y) = x + min { x, y } . The isoquants for the firm:
A.
are L shaped with the corners of the L on the line y = x.
B.
are L shaped with the corners of the L on the line y = x + 1.
C.
consist of two line segments, one vertical and the other with a slope of-1.
D.
consist of two line segments, one horizontal and the other with a slope of-1.