Read the passage below and complete the instruction that follows.
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.