I have some trouble with subject-verb agreement. How come the verb "have" not "has"? The subject of the dependent clause is "the economy," so I thought verb should be "has" instead of "have."


The treaty specifies that the economy of the member nations have inflation rates of less than three percent and resist external tariffs.

a. economy of the member nations have inflation rates of less than three percent and resist

b. economy of each member nation have an inflation rate of less than three percent and be resistant to

c. every economy of the member nations have an inflation rate of less than three percent and be resistant to

d. economies of each member nation have inflation rates of three percent or less and are resistant to

e. economies of every member nation have three

Answer: b