could not post reply

[vikram4689]

i could not post my reply on og-sc-105-t1277.html please tell why i could post on that thread and please answer below question

my question : i eliminated C & D on the basis that "called....emission" refers to "air pollutants". Am i correct here

[tim]

that forum is locked because the GMAT has asked us not to discuss their copyrighted problems on the forum. as such, we won't be able to help with you with your question..