Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Direct dyes exhibit poor wash fastness.
Reason (R): Direct dyes do not react with the fibre structure but rely on dye to fibre associations such as hydrogen bonding and dipole moments to help with colour fastness after dyeing.
In the light of the above statements, choose the most appropriate answer from the options given below: