Considering the context presented in the text and the use of the verb tenses in English, which alternative correctly fills out the gaps in the paragraph?

In the cartoon it is possible to read the following dialogue:
Cat: This bag is empty. Did you just give me an empty bag?
Dog: Yes.
Cat: I love ___ so much.
Find below the best option to fill out the gap in the cat’s second line, considering meaning, context, and grammar: