Since dogs have way better hearing than humans their ears are also a lot more sensitive. Loud scary noises like thunder would most likely sound way bigger and way more scary to a dog than humans. Also there might be rain or lighting. While rain will probably scare them because of the noise, dogs might be scared of lightning because they know the dangers of it.
B is the correct answer because A makes the reader believe that the two Notaries preferred ether of the options rather than specifying they each chose only one type.
