Compared to a Normal Individual, When a Patient with a Severe

Compared to a normal individual, when a patient with a severe obstructive impairment such as emphysema increases ventilation, which of the following occurs?

A) Carbon dioxide production falls as anaerobic metabolism increases.
B) Oxygen consumption increases at a faster rate than normal.
C) Oxygen consumption rises faster than carbon dioxide production.
D) The anaerobic threshold is reached later than normal.