The answer is C because it is exaggerating
When we say chronological order, this is the type of organization wherein events are arranged according to the time they happened. Therefore, this would be useful to the writer in order to make the readers understand any happenings that occurred previously. The answer would be the second option.
6. I agree with you up to a point. 5. I couldn't agree with the opinons being more expressed 1. I'm sorry but I can't agree with you.
This happens quite a lot in verbs e.g run to running. It is because you double the last consonant in a one-syllable noun for it to become a verb. (Keep in mind there are exceptions to this rule.)