How to smooth frizzy hair<br>Wash with a moisturizing shampoo. Frizz is often caused by dryness, so it's important to restore moisture to your hair in the shower. Always use a sulfate-free shampoo.
Can we infer the following?
It is advised to use shampoo that contains absolutely no sulfates in order to fix the problem of frizzy hair.

Select from:
[a]. Yes
[b]. It's impossible to say
[c]. No
The answer is:
[a].