the answer is c.They stress how the work towards achieving total equality won't be easy or pleasant.
"Sitting on the park bench" is the dangling modifier. Who is sitting on a park bench? Is it the sun? It does not make sense because you don't have a subject.
The correct answer is - Coincidentally, my oldest sibling, Nate, just turned nineteen.
It is quite easy to spot a subject - just ask the question who. Who just turned nineteen? - My oldest sibling.
The first option is incorrect because the phrase is used as an indirect object. C is incorrect because my brother Nate is the subject, and my oldest sibling is the appositive. D is incorrect because Nate is the subject, and my oldest sibling is predicate nominative.
