An oil company is buying a semi-submersible oil rig for $20 million. Additionally, it will cost $1.5 million to move the oil rig to the oil-field and to prepare it for operations. If it is depreciated over six years using straight-line depreciation, what are the yearly depreciation expenses in this case? A. $3.3 million B. $3.1 million C. $4.0 million D. $3.6 million An oil company is buying a semi-submersible oil rig for $20 million. Additionally, it will cost $1.5 million to move the oil rig to the oil-field and to prepare it for operations. If it is depreciated over six years using straight-line depreciation, what are the yearly depreciation expenses in this case? A. $3.3 million B. $3.1 million C. $4.0 million D. $3.6 million