Final answer:
The best evidence to challenge Sergio's argument is that foreign language study makes people appreciate cultural diversity, which aligns with his perspective on the advantages of direct communication in international settings.
Step-by-step explanation:
To determine which piece of evidence best challenges Sergio's specific argument about the necessity of learning foreign languages, we should consider the statement that knowing another person's language can provide significant advantages in understanding their culture, thinking, and how business is conducted overseas. Sergio's argument includes the advantage of being able to communicate without relying on interpreters and truly grasping the unspoken nuances of communication. Therefore, the following piece of evidence would best challenge Sergio's argument:
- Studying a foreign language improves knowledge of English and vocabulary.
- International travel is easier when you know a foreign language.
- Studying a foreign language decreases prejudice towards different people.
- Foreign language study makes people appreciate cultural diversity.
The fourth point is the most direct refutation of Sergio's argument because it highlights that speaking a foreign language can lead to an appreciation of cultural nuances and behaviors that interpreters might miss, which is essential in international settings and corresponds to the advantages Sergio mentions.