Which property is a physical property of matter? (I think A but I'm not sure pls help)

A. boiling point

B. reactivity

C. acidity

D. flammability

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity