D it states specifically that labor costs growth was slower in the U.S. than other countries such as Japan. C is wrong because the fact that unit costs are higher or wage growth is higher in other countries DOESN'T mean productivity is higher. E.g. it costs 10 dollars to produce a phone in the U.S....

I dont think Gmat would allow this kind of narrow and shortsighted questions IMO.
I dont think so.

Money/Gold Supply Up > Inflation Up (See housing prices as a proof)

B

I dont think it is GMAT problem. Too straightforward for GMAT

Easy question if u read carefully.
B

The gold was the PUREST known. Its content was 92. Other coins could be minted but they have to be refined. Thus their original content must have been less than 92 because 92 is the max.

E for sure. The point is: Musicologists didn't know when the scale was invented... now they know that it must have been at a certain time. Musicologists WOULD NOT know whether it is the earliest because that bone was the earliest that they EXPLORED but its too much to say that it is THE EARLIEST, p...

E
We know the project couldnt be started for years. We may then assume that every year the plan was proposed but the project was still on freeze. hence, what makes us think that the fact of satisfying comission means a start of a project?

Clearly D

AS far as I can see, we can safely choose between A and C. I go with C as A seems more ambiguous. "of some importance" - is really awkward. "which" also seems to modify investment banks instead of how important it is. That makes sentence really ambiguous and awkward. In C I dont ...