Who giggles after Komiyama comes into the room according to the passage？A．The old woman Ko

Who giggles after Komiyama comes into the room according to the passage？

A．The old woman Komiyama herself.

B．Komiyama"s fantastic pet robot.

C．A mechanical companion in Star Wars.

D．A naughty Japan"s creation Astro Boy.

请帮忙给出正确答案和分析，谢谢！