In_a_capillary_tube_experiment,_a_vertical,_30_cm_long_capillary_tube_is_dipped_in_water._The_water_rises_up_to_a_height_of_10_cm_due_to_capillary_action._If_this_experiment_is_conducted_in_a_freely_falling_elevator,_the_length_of_the_water_column_becomes$

• A. 10 cm
• B. 20 cm
• C. 30 cm
• D. Zero