单选题 The board of directors required that Mr. Brown expensive equipment justify buying at a time when the company was practicing strict economy.

【正确答案】 A

【答案解析】just 证明…有道理，解释…是正当的，选项A与之符合。verify核实，查证。 testify 证明，证实，作证。give evidence about给出…的证据。