Equipment Purchased at the Beginning of 2012 for $200,000 with Residual

Equipment purchased at the beginning of 2012 for $200,000 with residual value of $20,000 is being depreciated over a 5-year period using the double-declining-balance method.Which of the following statements is correct concerning the financial statements at December 31,2012?

A) The equipment account now has a balance of $120,000.
B) The book value of the equipment is now $80,000.
C) The accumulated depreciation account balance is now $80,000.
D) Depreciation expense for 2012 is $72,000.