The answer is B
display self confidence
Dissociative amnesia is a type of dementia that is different from amnesia. Normally this type of amnesia is a subconscious attempt to bury painful memories (which also accidentally bury other memories). Thing is those memories are not lost forever but are deeply hidden though events may flash periodically especially if there are triggers.
"D"
There are 1000 meters in 1 kilometer, and so you cover 10,000 meters in a 10k race
hope this helps
ALL OF THE ABOVE! All include human activity