Which result is quantitative data?

Correct answer: The seedling was eight centimetres long

The direct answer is C: the seedling was eight centimetres long. Quantitative data are data expressed through numbers and measurements. A number becomes especially useful when it is joined to a suitable unit, such as centimetres, grams, seconds, or degrees Celsius. Step by step: inspect each statement; ask whether it gives a measurable number; check whether a unit or numerical scale is present; choose the numerical measurement. Option A, “looked healthy,” is qualitative because it describes an appearance or condition in words. Option B, “the liquid was dark,” is also qualitative because it describes colour without a numerical measurement. Option C is quantitative because length is measured as 8 centimetres, written as a number plus unit. Option D, “felt moist,” is qualitative because it gives a descriptive judgement about moisture rather than a measured amount. The correct answer does not depend on whether the observation is useful; it depends on how the information is expressed. Memory cue: quantitative means quantity—look for a number and a unit; qualitative means quality or description.