$30.$ The U$.$S$.$ net international investment position

a$.$ has consistently been positive since $1975$ as a result of continuing service trade deficits.

b$.$ shows that the U$.$S$.$ has been a net creditor with respect to the rest of the world since $1975.$

$30.$ Using wage cuts to reduce cyclical unemployment during a contraction

a$.$ could worsen the contraction by reducing consumption spending by the affected workers.

b$.$ could be accepted by most workers, who generally regard wage cuts as fair business practices.

c$.$ could be put into effect by the payment of efficiency wages by many business firms.

d$.$ all of the above