The writer wants to add a sentence that introduces the topic of the passage. Which of the following sentences, if added to the beginning of the first paragraph, would most effectively accomplish this goal?
A. Language experts have long observed that children are better than adults at mastering a second language.

B. Scholars and journalists continue to debate whether studying a foreign language in college has any intrinsic value.

C. The development of young children’s brains is influenced both by children’s experience with their caregivers and by genetic factors.

D. Being able to express one’s thoughts in grammatically correct and reasonably eloquent sentences during job interviews can significantly impact one’s employment prospects.

E. Though many teachers of English composition would likely oppose the practice of giving grammar quizzes, a group of researchers found out some truly valuable information thanks to a quiz they designed and administered.