The answer is A) Hector Berlioz.
Berlioz wrote Grand Messe des Morts in 1837, a requiem requiring 210 singers, a very large orchestra, and four brass bands.
Dazzling describes things to be amazing, or better than most, so dazzling would be the answer
Perky, high-spirited, cheery, bubbly. Those are just some word that mean the same thing.
