How should this sentence be changed? My Aunt Debra owns three dogs she wants to get ?

How should this sentence be changed?
My Aunt Debra owns three dogs she wants to get another one.
Question 13 options:
a)
Add a comma and the word but after dogs
b)
Add a comma after dogs
c)
Add but after dogs
d)
No change needs to be made to this sentence.

busterwasmycat2021-03-31T14:01:13Z

Three ways to make this work properly (none are your options): 1) insert a comma followed by and ", and" between "three dogs" and "she wants" (make a compound sentence), use a semicolon at that same location, use a period at that same location (make two sentences, which is effectively what you have written anyway, except you forget the dang period after the first one).

I suppose you could use ", but" as well, but that implies that the getting another dog is contrary to the existing condition in some way.  It is not obvious to me that wanting another dog is contrary to the existence of three dogs already.

Whether you ought to use "and" or "but" depends on whether you consider that getting another dog is despite the existence of other dogs already, or because of it, or without any impact whatsoever from it.

Lord Bacon2021-03-31T11:22:08Z

Of the options listed, only c) (add 'but' after 'dogs') makes the sentence grammatically correct.
An option not offered is to add the word 'and' after 'dogs'.
Another option would be to put a full stop (a 'point' in some languages), after 'dogs' and to start a second sentence with the the word 'She'.