The correct answer is B. A borrowed word.
The word croissant came from the word "crescent." Thus, because of the shape of the croissant, the word was probably borrowed from crescent. So that's how they named the word. By borrowing it from the word crescent. I hope this answer helped you.
When I revise, I go through my paper and highlight all the mistakes that I can, using a different color for each kind. Then after I have done that, I just go through and fix them. It helps the revision go quicker and be more manageable.
Tentative means being unsure or hesitant. Hope this helps. <span />