Question

Designing shoes is hard work. It will pay off in the end.



Identify the sentence that combines the above passage into a complex sentence.

Designing shoes is hard work, but it will pay off in the end.
Designing shoes is hard work; however, it will pay off in the end.
Designing shoes is hard work; it will pay off in the end.
Although designing shoes is hard work, it will pay off in the end.