In the study of history the available documents for studying a certain period is unchanging over time.
Option: B
Explanation:
History is the study of events and phenomena over space and time. Space means where the particular incident is taking place. Time means the period of occurrence of particular event. A certain period suppose the period of sultanate or mughal empire requires some documents, records to be studied in detail.
And these available documents, records can never be changed over time. History is study of things over changing space and time. Archaeological evidences also keep some valid documents for studying historical events.
The correct answer is the afl ceased to exist
Miranda v. Arizona has a very significant impact today. This case ruled that any arrested person must be read his/her Miranda Rights (You have the right to remain silent. Anything you say can and will be used against you in a court of law. Etc.). This is due to the fact that many people self-incriminated themselves because they were unaware of their rights. This lead to innocent people being accused of crimes.
Hope this helps!