A declarative sentence is a statement that ends with a period. It states facts or an opinion and lets the reader know something specific. All of these sentences were declarative.
B
Not A or C because they I traduces new information to the paragraph, and this cannot be conclusions. Not D because it is off topic
The answer is C. a stone monument
The state of Texas spent almost $ 1.2 million on the execution of Leonard Hughes. Since they are talking about how death sentence is more expensive than life sentence in prison. And that answer talks about the costs.
I believe this is a dependant clause