Interjection, interjection, interjection
I would say b is the answer
but not sure tho
Eventually, it connects to the sentence duhh
To redline is to refuse to give insurance to someone living in an area considered a financial risk.
An example:
The loaner wouldn't give the family car insurance because the place that they lived was considered one of the most accident prone places in the county.
I would choose C. "Has been climbed." When you insert the other choices into the sentence, they are grammatically incorrect.