Designing shoes is hard work. it will pay off in the end.
identify the sentence that combines the above sentences into a complex sentence.
a.) designing shoes is hard work, but it will pay off in the end.
b.) designing shoes is hard work; however, it will pay off in the end.
c.) designing shoes is hard work; it will pay off in the end.
d.) although designing shoes is hard work, it will pay off in the end.