OCR A physics help

The answer is B but how?

The vertical acceleration due to gravity is the same regardless of the horizontal component of velocity. distance fallen vertically is the same so time is the same.

you could shoot a crossbow bolt horizontally from the same table top at 100 ms^-1 and it'd spend the same time falling (unless it his something else before the ground ) ... and so would a marble with zero horizontal velocity released from the same height

Thank you, that makes perfect sense now