Step-by-step explanation:
I could not find the column that is missing in your question but i will tell you some information that can help you.
- Since it is about the question mark, in this column, question mark should be replaced by the appropriate explanation of the previous sentence. Question mark is used in a place where explanation or description is missing of a unknown data.
We are having the most longer explanation in the answer a) but the real answer should be based by description of the previous sentence.