At the perennial insistence of the new states, the United Nation

At the perennial insistence of the new states, the United Nations General Assembly proclaimed ______ as the first development decade.
A、the sixties
B、the fifties
C、the seventies
D、the eighties
【正确答案】：A
【题目解析】：At the perennial insistence of the new states, the United Nations General Assembly proclaimed the sixties as the first development decade. 参见教材P301。