Which items in the list are secondary sources a historian could use to contextualize why a political revolution occurred in egypt in 2011

The correct answer is alternative D) II and III.

II and III are secondary sources of information, since they weren't written by a witness of the events.

I and IV are primary sources of information, since they were made in the period of the event, by witnesses of the event.

the titanic was filmed in canada and si my fav