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".

[Q]: The town was only able to find a source of water and not the oil because the _ was scarce. (A) water (B) oil
[A]: B

[Q]: The couple were renovating their new home and replaced the paint but not the wallpaper because the _ was peeling. (A) paint (B) wallpaper
[A]: A

[Q]: Joseph has an allergy to mangoes, but Nelson does not, so _ has to be very careful. (A) Joseph (B) Nelson
[A]:
A