The correct option is C skirted
Option C: 'Skirted' means 'to ignore or avoid dealing with'. It is suitable for the sentence as it's mentioned: His speech was disappointing; the reason being that "the major issues" were avoided.
Hence C is correct.
Option A: 'Projected' means presented or displayed. It does not relate here, as the reaction of 'disappointment' contrasts with the words "it projected all the major issues".
Option B: Similarly, 'revealed' means 'to make known to others'. This word is also in contrast with the sentence.
Option D: 'Analyzed' means to examine; this word too contrasts with the sentence.
Hence options A, B and D are incorrect.