Question

which quote from the story best supports the idea that brennan watches mr. nelsons conducting in an effort to hold back his tics, or involuntary noises and movements?
actually, he was practically consumed by the motions.
the chorus was singing \defiance,\ brennans favorite.
sometimes, the perfect regularity of mr. nelsons conducting was enough to stop him from doing anything.
but the impulse barreled over the gate he tried to put up in his mind.

Explanation:

We need to find the quote that shows Brennan watches conducting to hold back tics. The key is to look for a connection between conducting and stopping tics (involuntary actions).

• "Actually, he was practically consumed by the motions." - This just shows he was into the motions but doesn't link to holding back tics.
• "The chorus was singing 'Defiance,' Brennan’s favorite." - Mentions a song he likes, no relation to holding back tics via conducting.
• "Sometimes, the perfect regularity of Mr. Nelson’s conducting was enough to stop him from doing anything." - The "stop him from doing anything" can be inferred as stopping his tics (involuntary noises/movements) as he watches the conducting.
• "But the impulse barreled over the gate he tried to put up in his mind." - Talks about an impulse overcoming a mental barrier, not about how conducting helps hold back tics.

Answer:

Sometimes, the perfect regularity of Mr. Nelson’s conducting was enough to stop him from doing anything.