Final answer:
The communication style described in the question, where direct eye contact is encouraged and a smile is an appropriate expression for 'thank you,' is an example of low-context communication.
Step-by-step explanation:
The communication style described in the question, where direct eye contact is encouraged and a smile is an appropriate expression for 'thank you,' is an example of low-context communication. In high-context communication, meaning is often implied and understood through underlying cultural cues, while in low-context communication, meaning is communicated explicitly through words and gestures. In the Vietnamese-American culture, direct eye contact and a smile provide direct, explicit communication, indicating low-context communication.