单选题 In the early 20th century, at the advent of the telephone, it was considered a superfluous instrument which would never be of practical use in the average household.

A、 appearance
B、 popularity
C、 dominance
D、 consolidation

【正确答案】 A

【答案解析】advent出现，到来；appearance出现；popularity普及，流行；dominance优势，统治；consolidation巩固，合并。