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

identify the sentence that combines the above passage 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.

D). Although designing shoes is hard work, it will pay off in the end.

Explanation:

The sentence that integrates the given passage into a complex sentence would be 'Although designing shoes is hard work, it will pay off in the end' as it carries all the essential characteristics of a complex sentence. It carries a dependent clause 'Although designing shoes is hard work' which begins with a subordinate conjunction 'although' followed by an independent clause 'it will pay off in the end' that can stand alone on itself. Thus, option D is the correct answer.

you have to either add a photo or put them answers in with the questions

answer; (b); the abolitionist movement;