What is a polite way to express gratitude after meeting someone?

Expressing gratitude can significantly impact relationships and interactions, making option B particularly effective in this context. Saying "I am glad to have met you" not only conveys appreciation for the person's time and presence but also implies respect and acknowledgment of their importance in the interaction. This phrase emphasizes a positive sentiment and fosters a sense of connection, encouraging further communication and engagement.

In contrast, other options may lack the warmth and sincerity associated with a genuine expression of gratitude. For instance, simply saying "Thanks, I have to go" can come off as dismissive, as it doesn’t fully acknowledge the value of the meeting or the other person's contribution to the conversation. Similarly, "Okay, see you later" is casual and may not adequately convey gratitude, while "Let's meet again sometime" suggests a desire for future interaction but doesn't directly express thanks or appreciation for the current meeting. Thus, option B stands out as the most polite and effective way to express gratitude after meeting someone.