The answer would be (D), put in order again.
If we look closely we can see that the word "reorganize" is really just re+organize. Re is a prefix, and it means "again".
We know that to organize is to order, and re means again, so reorganize would mean "to put in order again."
Hope I helped! ;)
It's like picking baseball and describing it. How to practice, how to play what material/equipment you need... I hope that helps.
<span>B. to provide evidence that the age of discovery is concluding</span>