Here it says to identify the amine that will likely accept a proton. Remember, a proton is H₊ when in the presence of an acid. All right, so first of all it says in a mean. Let's see which ones don't represent a means. A means themselves possess nitrogen and hydrogen or carbon, nitrogen and hydrogen in some way.

If we take a look, C is not an amine because of the presence of sulfur, and it doesn't even have nitrogen. E is also not an amine because here there's no nitrogen present. There's carbon and hydrogen, but where's the nitrogen next? It says, well weekly accept a proton when in the presence of an acid, weakly except a proton. Remember that's a definition of a weak base.

Here AB and D are all means, but remember it's the neutral means that represent weak basis. Positively charged A means represent weak acids. So here this is a weak asset. Since it's positively charged, this is a weak asset since it's possibly charged. The answer here would be option B that represents A neutral mean. Therefore it's a weak base and A weakly accept a proton from an acid.