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Calculating the number of days in each quantity would be timeconsuming; each date range includes a lot of days! Instead, a faster approach is to compare the starting and ending dates for the two quantities.
Quantity A: The number of days between May 30, 1917 and May 15, 1996, inclusive.
Quantity B: The number of days between May 15, 1912 and May 30, 1991, inclusive.
All of the start and end dates are in May, but both the starting and ending years in Quantity B are 5 years earlier than those in Quantity A. Thus, the approximate whole number of years in both ranges is the same (about 79 years). However, the range in Quantity A starts later in the month and ends earlier in the month than the range in Quantity B. Both differences mean that Quantity B includes a greater number of days.
Alternatively, consider the following: the date range in Quantity A is about half a month less than 79 years, while the date range in Quantity B is about half a month greater than 79 years. Quantity B is greater.
Answer: B