Which is NOT true about the Euro-bond market?

a. the euro-bond market is an external market, because it is outside the regulatory jurisdiction of any one country;

b. the bonds so issued are in unregistered form because the owner's name is not cited on the face of the bond itself

c. coupon payments are made semiannually rather than annually, as is the custom in the United States;

d the bonds are issued on an unsecured basis, which effectively limits the demand in this market to only the highest-quality issuers.