Answer:
The correct options are:
1. b. simple
2. a. complex
Explanation:
Let's first analyze the sentence "The table below illustrates these issues." This is an independent sentence, for it expresses a complete thought on its own. In this sentence, we have only one subject and its predicate, meaning it consists of one clause. When a sentence has only one clause, its called a simple sentence.
Now, let's take a look at "Although Denise had some doubts, she found the courses very useful." We have two different clauses here, a dependent one and an independent one. The dependent clause can be recognized by the use of a subordinating conjunction indicating contrast, "although". The dependent clause - "Although Denise had some doubts" - does not express a complete thought on its own, whereas the independent one - "she found the courses very useful" - does. When a sentence is comprised of a dependent clause and an independent clause it is called a complex sentence.
