Answer:
(D) A and B only
Explanation:
Two other plausible stories that could shift the demand for newspapers to the rights are:
A: If income levels are rising (and given that newspaper is a normal good). Due to this reason, we would expect more people in Baltimore who before now, were not buying newspaper due to their low income, to begin to buy, thus shifting the demand curve to the right.
B: fewer substitute. When the populace have no viable alternative to get news daily, more people are likely to buy newspaper, thus shifting the demand curve to the right.
Option C is incorrect as a shrinking population will translate to reduced demand resulting in a shift of the demand curve to the left.