Della is sad that she didn't have enough money saved to get gifts; since it says "...and the next day would be Christmas," this implies it was important to the plot or story. The answer should be D.
The store gave out samples by the dozen. - Is the correct phrase, as an adverbial phrase is a word/ phrase that modifies the/ qualifies an adjective. So the 'dozen' modifies the sentence.
Bismillah Khan's first foreign trip took him to Afghanistan where King Zahir Shah was so impressed with the maestro's shehnai recital that he honoured him with gifts of priceless Persian carpets and other souvenirs.
