Chinese Mini-test: 差不多 (Advanced)

Advanced Level 高级 (gāojí)

“It’s almost 8 o’clock. I will be late for my if I don’t hurry up.” What are the characters for “almost” in this sentence?
A. 要不然 (yàobùrán)
B. 是不是 (shìbushì)
C. 差不多 (chàbuduō)
D. 行不行 (xíng buxíng)