Beginner Level 初级 (chūjí)
The correct answer for this Mandarin mini-test is B.
Analysis:
A. 不知道 (bùzhīdào) means “I don’t know” or “I have no idea.”
B. 当然 (dāngrán) means “Of course.”
C. 可能 (kěnéng) means “It’s possible.”
D. 不客气 (búkèqi) means “You are welcome.”