His __ remarks at the conference alienated many of the attendees who found them offensive and appropriate.
His __ remarks at the conference alienated many of the attendees who found them offensive and appropriate.
Explanation
The sentence says that his remarks alienated many of the attendees and that they were offensive and inappropriate.
We need a word that conveys something extremely bad or shocking.
Egregious = outstandingly bad or shocking (negative — fits the sentence)
Felicitous = well-chosen or suitable (positive)
Decorous = polite and restrained (positive)
Commendable = deserving praise (positive)