Ammonia (NH₃) Acts as a Weak Base in Aqueous Solution

Ammonia (NH₃) acts as a weak base in aqueous solution. What is the acid that reacts with this base when ammonia is dissolved in water?

A) none, there are no acids in pure water
B) H₂O
C) NH₄⁺
D) trick question, because no acids are present, ammonia cannot act as a base
E) oxygen that always is dissolved in water