The correct answer for this question is D. There is no single topic
sentence within this piece of writing. A topic sentence is used to summarize what is going to be, or what has been written about, and there
is no such sentence within this piece.
In April of 1869, George Westinghouse obtained a patent for one of his most important inventions, the air brake.
Answer:
i can help, no need for money
Answer:
A simple sentence consists of <u><em>only one clause</em></u>. A compound sentence consists of two or more independent clauses. A complex sentence has at least one independent clause plus at least one dependent clause. A set of words with no independent clause may be an incomplete sentence, also called a sentence fragment.
The second one is the answer. Hope this helps.