It should be (A). "break in" in this sense is normally intransitive.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
vdbBreak in and break into mean the same thing according to the dictionaryI think you may be mistaken about what dictionaries do. There are no two words that mean exactly the same thing or can always be used exactly the same way. The dictionary is just giving you other words and/or expressions that have very similar meanings in some contexts