定冠词the 既可以表特指，也可以表类指，下列哪一个选项不是表示特指？
A: March is the third month of the year.
B: He is the best man for this job.
C: The richest are not always the happiest.
D: The sun is shining.
A: March is the third month of the year.
B: He is the best man for this job.
C: The richest are not always the happiest.
D: The sun is shining.
