As part of a deal for power$-$generating equipment, Solar Wind Company and Thermal Gen Ltd$.$ enter into a written contract that includes a clause providing for the arbitration of any dispute in the United States. Under the New York Convention, if a dispute arises, a court will compel arbitration if both parties are

a$.$ not U$.$S$.$ citizens.

b$.$ citizens of non$-$signatory countries.

c$.$ citizens of countries that are members of the World Trade Organization.

d$.$ U$.$S$.$ citizens.