Select the sentence that correctly uses commas in a non-restrictive phrase.

A river, that is polluted, is unsafe for swimming.

Polluted rivers, which can exist anywhere, are unsafe for swimming.

When a river becomes polluted, it is no longer safe for swimming.

However, rivers sometimes become polluted when nearby farms use too many poisons.

Question

Select the sentence that correctly uses commas in a non-restrictive phrase.

 A river, that is polluted, is unsafe for swimming.

 Polluted rivers, which can exist anywhere, are unsafe for swimming.

 When a river becomes polluted, it is no longer safe for swimming.

 However, rivers sometimes become polluted when nearby farms use too many poisons.

ashleyisakitty · Answer

I think it might be answer C). However, I am not 100% sure.