GMAT Modifier rules

[veronica1]

I was composing an email outside of my gmat prep that made me wonder about GMAT verbal rules. Is there anything wrong with the use of the word which (i.e. would GMAT require a comma) in the sentence below? Would it be better (according to the GMAT) to use the word 'that' because which cannot modify two words - rocco paper or is modifying paper enough? or should i make mention an -ing participle?

Let me call your attention to the Rocco paper which mentions the need for hand collected data

Thanks!

[RonPurewal]

I was composing an email outside of my gmat prep that made me wonder about GMAT verbal rules. Is there anything wrong with the use of the word which (i.e. would GMAT require a comma) in the sentence below? Would it be better (according to the GMAT) to use the word 'that' because which cannot modify two words - rocco paper or is modifying paper enough? or should i make mention an -ing participle?

Let me call your attention to the Rocco paper which mentions the need for hand collected data

Thanks!

please post in the correct folder from now on.

the gmat would use "that" rather than "which" here, but they aren't going to test you on that.

you should think of "rocco paper" as a single noun, not as two words. by the same token, you should also think of the United States of America as a single noun -- basically one word, not five.