<span>D.) The reporter is writing a story about a study linking exercise and health.</span>
if you are lawfully arrested by an officer who has probable cause to believe that you have been driving under the influence, then you consent to taking a chemical test of your blood or breath for the purpose of determining your blood alcohol content
The first sentence is an interrogatory question, so a question mark is used. The second sentence is a declarative sentence and will use a period. The third sentence is an exclamatory sentence, and should use an exclamation mark at the end.