Using the isoquant-isocost curves, what will be the choice of a cost-minimizing firm suppose the wage rate increases but the firm wants to produce the same level of output? (show using graph)

a) Reduce the use of both K and L in production

b) Reduce the use of L, increase K

c) Reduce the use of K, increase L

d) The firm will be indifferent between the two: reducing L and increasing K, or reducing K and increasing L

e) Cannot be determined