Use the sense answer the question Maverick needed to go to the store. His dog wanted to go with him which option best combines the two simple senses, and one compound sentence while maintaining the meaning of the original sentence.
Maverick needs to go to the store, and his dog wanted to go with him
Because Maverick needs to go to the store, his dog wanted to go with him
Because his dog wanted to go with him, Maverick needs to go to the store
Maverick and his dog went to the store.