She bit at her lip and tucked her hands behind her , looking up into his eyes a little . " Ano .. yes ? " He leaned forward , ducked his head , and kissed her firmly on the lips , grinning . His hair fell in his face a little bit before he withdrew , grinning like the cat who ate the canary .

Question: Why did the guy kiss the girl ?
Answer: Because she tucked her hands behind her .Because he grinned like a cat who ate the canaryNone of the above choices .Because she said " Ano .. yes ? "