While measuring the speed of sound by performing a resonance column experiment, a student gets the first resonance condition at a column length of `18 cm` during winter. Repeating the same experiment during summer, she measures the column length to be `x cm` for the second resonance. Then
A. `18 gt x`
B. `x gt 54`
C. `54 gt x gt 36`
D. `36 gt x gt 18`