Which supporting detail would best develop this topic sentence from an expository essay?
One benefit of learning another language is that knowing it can come
in handy when traveling to another country.
A. People speak English as their primary language in only about a
quarter of the world's countries.
B. There are several benefits to learning a foreign language: It is
useful when traveling, it connects you to other cultures around the
world, and it develops your brain.
C. When visiting another country, it is important to be well prepared
for your trip.
D. The Pinevale Junior High Times reports that only 23 percent of
sixth-grade students have traveled to other countries, but 56
percent have studied a foreign language.