All of the Following Indicate That an Adult Patient Is $\dot { \mathrm { Q } } _ { s } / \dot { \mathrm { Q } } _ { t }$

All of the following indicate that an adult patient is ready to be weaned from ventilatory support except:

A) VC = 1.9 L
B) spontaneous rate of 32/min
C) $\dot { \mathrm { Q } } _ { s } / \dot { \mathrm { Q } } _ { t }$ = 8%
D) MIP = -45 cm H₂O