Answer:
A) No Change
Explanation:
When the demolition team sent the wrecking ball sailing into the old stadium, a massive boom reverberated out to the city.
Boom - is an onomatopoeia of what crashing would sound like
Explosion - not an onomatopoeia
Thwack- an onomatopoeia, but more off a slapping noise than a crash.
So A would be the answer.