Which of the following sentences uses the word "subtle" correctly?
the song is usually played on a cd player because it is subtle.
most films have ratings that are meant to be extremely subtle.
there was a subtle smile on her face that said she had a secret.
many people love to subtle their food when they are hungry.

- "a nonrestrictive clause functions as a modifier to a noun (that is an object, person or concept). these clauses can be described by the following three options: it is set off by comas, it contains a subject and a verbs and it adds nonessential information to the sentence.

for example, in "here is bill gates, who confounded microsoft software company" we can identify "who confounded microsoft software company" as a nonrestrictive clause modifying the noun bill gates. this clause can be describes as a nonrestrictive clause because it is separated by a comma, it adds nonessential information to identify who bill gates is and it must contain both a subject (who) and a verb (confounded)."

1)a

2 b

3 d

4 d or b

explanation: