Which of the following are required in order to apply the built-in gains tax on an s corporation? (Check all that apply.)

a. It is the corporation 's responsibility to prove the fair market value of assets on the date an S election takes effect.
b. Built in gains tax can be reduced by carry forwards from prior C corporation years.
c. Built in gains tax will apply to assets disposed within 10 years of the corporations first day
as an S corporation.
d. All of the above