How Many Air Molecules Are in a Room at Temperature

How many air molecules are in a room at temperature 23.8 °C and standard pressure if the dimensions of the room are 3.44 m × 3.26 m × 2.28 m?

A) 2.08 × 10²⁴
B) 4.20 × 10²⁴
C) 3.78 × 10²⁵
D) 6.32 × 10²⁶
E) 8.05 × 10²⁶