Identifying sentence structures in the space provided, identify each of the following sentences by writing s for simple, cd for compound, cx for complex, or cd-cx for compound-complex. example 1. cd-cx although many book reviewers ignored j. k. rowling's first book, harry potter and the sorcerer's stone, readers paid attention, and it became a hit. the first three harry potter books landed on the bestseller lists because both young people and adults enjoy the stories that follow harry through his challenging life.

The sentence given above is A COMPOUND COMPLEX SENTENCE.
A compound complex sentence is a sentence which is made up of at least two independent clauses joined by a conjunction and one dependent clause. In the sentence given above, there are two independent clauses and one depend clause as follows:
1. The first three Harry Potter books landed on the bestseller lists.
2. Both young and adult enjoy the stories.
3. That follow Harry through his challenging life.
Sentence 1 and 2 are independent clauses while sentence 3 is dependent clause.