Chinese Test: What does “白 (bái)” refer to in Chinese?

Beginner Level 初级 (chūjí)

Gānggāng diànnǎo sǐjī le, wǒ de gōngzuò quán dōu bái gàn le.
刚刚            电脑   死机了，我 的    工作       全    都   白 干 了。

What does “白 (bái)” refer to in the above context?

A. White
B. In vain
C. Black

See Answer

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