Answer:
The answer is: B. What other inventions have made city-living easier?
Step-by-step explanation:
As you can see, question B and C have a precise answer, if you google it, you will see the name of the company (letter A) and the name of the person (letter C). Letter D is another question which has an exact number, according to the information provided in the article; however, Letter B, is the question which you could ask to yourself before reading the article and come up with some answers according to your own experience, world knowledge or other articles read before, about the topic. The other questions have an exact answers and you couldn't give any with anticipation, unless you had already read the article or another ones.