Let the gecko eat the hokdoks

(我喜歡子恆的post)
The education department should do something


我親愛的佳瑩在UCSI也給她掃完場！！！！！ <3 <3


我有很多不會做的Chemistry past year問題啊！！！
有誰知道:
The gecko,a small lizard,can climb up a smooth glass window. The gecko has millions of microscopic hairs on its toes and each hair has thousands of pads at its tip. The result is that the molecules in the pads are extremely clase to the glass surface on which the gecko is climbing.

What is the attraction btw the gecko's toe pads and the glass surface?
A. co-ordinate bonds
B. covalent bonds
C. ionic bonds
D. Van Der Waal forces

Which and why for a reason?????....oh shit