There was a rustic charm that I immediately fell in love with . Mosquito nets hangs above every bed , and there 's something very romantic about having them draped around you as you sleep . I never felt a mosquito while I was there , but I used the nets anyway .

Based on the preceding passage, choose your answer for question How do mosquito nets keep out mosquitoes ?
Options are:
a). It is a mask that hides me away.
b). It is so thin , it confuses the mosquitoes.
c). None of the above choices ..
d). It is like a chemical aura.
The answer is:
c).