Nowbody knows exactly when Rome was founded. Legend has it the city was founded on April 21, 753 BC.

There are several myths about how this happened.
The most popular story is that two brothers built the city. Their names were Romulus and Remus. Romuls built a wall around the city, but Remus made fun of it. He easily jumped over the wall. This made Romulus angry. He then killed his brother. True or not, we do know that Rome grew from an area of small farming villages into a great power. The Rome Empire controlled much of the ancient world.
Q) The word this in paragraph 1 refers to

A) April 21, 753 BC

B) a legend

C) the city of Rome

D) the founding of Rome
제 생각에는 d 번 같은데..답이 b라고 나와서요.