Which of the following sentences

has correct punctuation?
(1 point)
Laura has an Australian
cattle dog I have a
miniature Schnauzer.
Laura has an Australian
cattle dog, I have a
miniature Schnauzer.
Laura has an Australian
cattle dog; I have a
miniature Schnauzer.

The correct sentence with proper punctuation is:

Laura has an Australian cattle dog; I have a miniature Schnauzer.