In which of the following situations can WACC NOT be used as the discount rate? Multiple Choice

Firm V, a producer of vending machines, is planning to expand its current manufacturing facilities for vending machines.

Firm W, a wind turbine manufacturer, is investigating the possibility of expansion into the production of wheels.

Firm X, a xylophone producer, wants to enter into the guitars industry.

Firm Y, which produces yams and taros, would like to abandon yams and focuses on taros.

Firm Z, which manages zoos, would like to look into the option of leasing pandas from China