"Blow great trumpet / hom" refers to:

Explanation

The phrase 'blow one's own trumpet' is an idiomatic expression that means to boast or brag about one's own accomplishments. Option A, 'boast', is correct as it aligns with this definition. The other options are incorrect as they do not capture the meaning of this particular idiom. 'Violent flow of winds' and 'eruption of war' are unrelated to the context of self-promotion, and 'celebrate enthusiastically' does not imply the self-focused boasting implied by the expression.