Economic problems were exacerbated by three bad harvests with the result that national in-come and the volume of foreign trade contracted during 1960-1962.    (   )

Economic problems were exacerbated by three bad harvests with the result that national in-come and the volume of foreign trade contracted during 1960-1962.    (   )

A.deepened

B.stagnated

C.deteriorated

D.postponed

正确答案是C