Aaron and Katie Are Building a House

Multiple Choice

Aaron and Katie are building a house.They want to make sure they have a good relationship with the neighbours and do not want to impose any negative externalities on them.Which of the following are measures to avoid negative externalities on Aaron and Katie's neighbours?
(i) making sure their windows do not look into the neighbours' yard
(ii) carefully insulating their house so that sound doesn't carry when they play loud music
(iii) building an environmentally friendly house.

A) (i) , (ii) and (iii)
B) only (i) and (iii)
C) only (ii) and (iii)
D) only (i) and (ii)