(1) have you ever heard of a stradivarius violin? (2) it is a type of instrument that was built by members of the stradivari family in italy during the 1600s and 1700s. (3) they used a variety of wood and secret methods to create different instruments, and about 650 of their violins still exist today. (4) some musicians, who play stradivarius violins, refuse to use any other.

which sentence contains an error in the use of a restrictive clause?
sentence 2
sentence 4

how could you correct this error?
by removing both commas
by removing the comma after musicians

Sentence 4, by removing both commas

The sentence that contains an error in the use of a restrictive clause is Sentence 4. The clause "who play Stradivarius violins" is restrictive because it puts a restriction on which musicians the sentence refers to. It is necessary to the meaning of the sentence. Restrictive clauses should not be set off by commas. Commas are only used around nonrestrictive clauses. We can also tell that Sentence 4 is the correct answer because of the options given in the second question. Sentence 4 is the only one that has commas or the word "musicians".

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