Final answer:
After a nominative absolute, a comma is used as the correct punctuation to separate it from the main clause of the sentence. The correct answer is option b).
Step-by-step explanation:
A nominative absolute is a grammatical construction that includes a noun or pronoun and a modifier. This construction is usually separated from the rest of the sentence with a comma. Therefore, the correct punctuation used after a nominative absolute is a comma. After this comma, the main clause of the sentence continues.
For example, consider the sentence: 'Weather permitting, we will go to the beach tomorrow.' Here, 'Weather permitting' is the nominative absolute, and it is followed by a comma before continuing with the main clause of the sentence.