Answer:
D. because it helps him make money
Explanation:
I choose D. because it helps him make money, for 2 reasons after reading the excerpt.
1, "it was not to be thought that any traveler could pass the Palace Hotel without looking at it."
2, "Pat Scully, the owner, had proved himself a master of strategy when he chose his paints. It is true that on clear days, when the great express trains swept through Fort Romper, passengers were overcome at the sight."
To similfy, it is evidence to support that the reason why he choose light blue was to attract the attention of possible customers, which, it's purpose is to help him make money.