In Year 1, Hilary Leary purchased three blocks of XYZ Company common stock as follows: March 1, 100 shares at $50 per share; June 15, 100 shares at $55; October 1, 100 shares at $60. On January 15 of Year 4, Hilary sold 200 shares at a price of $70 per share. Under IRS regulations, which two of the following cost flow assumptions are acceptable in determining the cost basis to be used in measuring Leary's gain on the sale?
A. FIFO or weighted average.
B. Specific identification or weighted average.
C. Specific identification or FIFO.
D. FIFO or LIFO.