I think Its B just for sum point thought just ignore this
"This is the second activity in the repetition strategy" indicates that the word revisit would be the best word to use to sum up the idea since repetition strategy definitely suggests revisiting. Something which is repeated is done over again so in the act of re-doing it it means it is also re-visited.
Answer:
Five
Explanation:
There are five main hardware components in a computer system: Input, Processing, Storage, Output and Communication devices.
To turn over
hope this helps