12. In 2004, Horton Company purchased a tract of land as a possible future plant site. In January, 2012, valuable sulphur deposits were discovered on adjoining property and Horton Company immediately began explorations on its property. In December, 2012, after incurring $800,000 in exploration costs, which were accumulated in an expense account, Horton discovered sulphur deposits appraised at $4,500,000 more than the value of the land. To record the discovery of the deposits, Horton should A) debit $5,300,000 to an asset account. B) make no entry. C) debit $800,000 to an asset account. D) debit $4,500,000 to an asset account