Migraine, the most debilitating common form of headache, afflicts perhaps 18 million Americans, who collectively lose 64 million workdays a year, and they cost the nation $50 billion in medical expenses and lost work time.
In the above sentence,a cause affect relationship is shown i.e because of migraine--- Americans are affected and hence costing the nation $50 billion in medical expenses ......, So based upon this (c) is wrong because its depicting that something intensionally is being done.
(A) year, and they cost the nation $50 billion in medical expenses and lost
"They" here is reffering to Americans which shouldn't be the case.
(B) year and thus cost the nation $50 billion in medical expenses and lost
Correcr option because "thus" is stating the affect and is going to migraine.
(C) year, so as to cost the nation $50 billion in medical expenses and lost
So as to...states something is happening intensionally
(D) year that costs the nation $50 billion in lost medical expenses and
That here is going through year, which is not costing the nation....meaning is altered here
(E) year, which thus cost the nation $50 billion in lost medical expenses and
Which is again going to year, hence meaning is altered.

AnjaliOberoi wrote:Migraine, the most debilitating common form of headache, afflicts perhaps 18 million Americans, who collectively lose 64 million workdays a year, and they cost the nation $50 billion in medical expenses and lost work time.
In the above sentence,a cause affect relationship is shown i.e because of migraine--- Americans are affected and hence costing the nation $50 billion in medical expenses ......, So based upon this (c) is wrong because its depicting that something intensionally is being done.
(A) year, and they cost the nation $50 billion in medical expenses and lost
"They" here is reffering to Americans which shouldn't be the case.
(B) year and thus cost the nation $50 billion in medical expenses and lost
Correcr option because "thus" is stating the affect and is going to migraine.
(C) year, so as to cost the nation $50 billion in medical expenses and lost
So as to...states something is happening intensionally
(D) year that costs the nation $50 billion in lost medical expenses and
That here is going through year, which is not costing the nation....meaning is altered here
(E) year, which thus cost the nation $50 billion in lost medical expenses and
Which is again going to year, hence meaning is altered.

Hi Anjali,

How are A & B different in their meaning?

A attributes the case to the Americans, but so does B since it uses the verb 'cost' (for a plural noun- Americans). I think had the verb been 'costs', the case would have been rightly attributed to the condition i.e. migraine and not Americans.

I would appreciate if an instructor intervened and cleared the doubt.

Hi Bharat,

ya, i also think that it should be costs not cost.....
Migrane afficts
Migrane costs .....
Let's wait for an expert's opinion.


//Anjali