Answer:
D is the answer because I think it is right plus I know they don't use two off them
Answer: D- making flexible eyeglass frames
Explanation: my powerful mind
The answer to your question is frequency.
If you would like further information about the subject, private message me and id be happy to explain in further detail for you!. :0
The chemicals including in cosmetic are:-
1.Talcum Powder
2.Nanoparticles
3.Coal Tar
4.Triclosan
5.Toluene
Hope this helps you.