While taking the final exam in American history, Marie was surprised and frustrated by her momentary inability to remember the name of the current president of the United States. Her difficulty most clearly illustrates
a. implicit memory
b. dÈja vu
c. the misinformation effect
d. retrieval failure

Retrieval failure is an explanation for forgetting from long-term memory. It refers to difficulties in recall that are due to the absence of correct retrieval cues or triggers. So most likely D

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )

chavez's example shows that nonviolent protest can work well. it shows that one nonviolent man can stop a mob, which proves chavez's point and persuades people to protest nonviolently.