In 2012, all of fast-food chains expanded their hours of operation, with nearly 40% of all McDonald's restaurants being open 24 hours per day. This strategy was aimed at increasing sales because:

A) it was estimated that nearly one-fifth of all employed Americans worked primarily in the evening contributing to the demand for fast-food in late hours.
B) it was estimated that consumers who shop at night tend to be more price sensitive.
C) it was believed that longer hours of operation would lead to greater brand loyalty.
D) none of the above.

A