867000 rounded to the nearest hundred thousand

Based on context, the word “insoluble”most likely means?

The author most likely uses the word monstrous rather than the word “unpleasant” because it has a more positive connotation than the word “unpleasant.” a more negative connotation than the word “unpleasant.” a more neutral connotation than the word “unpleasant.” almost the same connotation as the word “unpleasant.”

May someone me with these questions