Select the option that best explains the information conveyed in the sentence.

The investigators stated clearly that they had reached a dead end in their scrutiny of suspects in the murder case?

• A the investigator did not know what to do with the suspects' murder
• B the investigators had evidence to sentence the suspects to death in the end
• C There was no further progress inthe investigation of the murder suspects
• D the end had come for the suspects in the murder case