Which Level of FIO₂ and What Time of Exposure Have $\quad \mathrm { FIO } _ { 2 } \geq 0.5$

Which level of FIO₂ and what time of exposure have been associated with oxygen toxicity?
I. $\quad \mathrm { FIO } _ { 2 } \geq 0.5$
II. $\quad \mathrm { FIO } _ { 2 } \geq 0.7$
III. $\quad \mathrm { FIO } _ { 2 } \geq 0.6$
IV. $\quad$ 24 to 48 hours
V. $\quad$ 48 to 96 hours

A) I and V
B) III and IV
C) III and V
D) I and IV