In this task, you are given a question containing a blank (_) and two options. You should pick the best option to answer the question. Please answer with "A" or "B".

With the glasses you could not see to the horizon, but the lenses allowed you too, since the _ were optically strong. (A) glasses (B) lenses
B

The doors collapsed instantly while the windows were intact, since the _ were weak against the pressure of the wind. (A) doors (B) windows
A

They hung the scarves along the wall instead of the mantle because of the _ 's rough surface. (A) wall (B) mantle

B