Can we draw the following hypothesis from the context (see options)?

Context:

How to get rid of smoke smell<br>Let the book air out. Gently hang an open book over a railing or on a clothesline outside for a few hours to a day. This should cause the smell to decrease.

Hypothesis: Books with hard covers are easier to get smells out of than paperbacks.
Select from the following.
[I] Yes;
[II] It's impossible to say;
[III] No;
[II]