before performing a coloring service with an aniline derivative product, the client must have a(n)…

before performing a coloring service with an aniline derivative product, the client must have a(n) _____.\npreliminary test\napplication method\npatch test\ninsurance record
Answer
Brief Explanations:
Aniline - derivative products in coloring services can cause allergic reactions. A patch test is done to check for such sensitivities before the full - service application.
Answer:
C. patch test