Problem: Which of the following best describes how controlled breathing impacts the body and mind during moments of distress? Need Assignment Help? Select one: O a. Controlled breathing decreases CO2 levels in the bloodstream, increasing blood acidity and activating the amygdala to signal stress reduction. O b. Lengthening the inhale during controlled breathing blocks the vagus nerve, which prevents the brain from interpreting signals related to stress. O c. Lengthening the exhale through controlled breathing reduces CO2 in the bloodstream, lowers blood acidity, and reassures the amygdala, signaling that it is safe to "rest and digest." O d. Controlled breathing increases CO2 levels, which raises blood alkalinity and helps the amygdala signal the body to calm down.