南朝梁昭明太子萧统编纂的文学总集《文选》在唐代备受青睐，宋初仍有“《文选》烂，秀才半”之说。这一现象产生的直接原因是[ ]

A、儒学丧失了独尊地位

B、进士科主考诗赋策论

C、社会上书籍极为匮乏

D、唐朝人喜爱南朝文化

The task at hand now is to (56) the programmers who still use yesterday’s software technology to solve today’s software problems. Object-oriented programming requires a new attitude toward problem (57) . Problem (57) with computer system becomes more natural. Application can (58) be translated into (59) . Although it is commonly believed that it will be easier to train new programmers to use object-oriented techniques than to (60) programmers who have substantial experience in applying conventional programming language constructs.

（57）是（）

A.solve

B.solves

C.solved

D.solving