We can safely conclude that ______ may cause educational problems.

A．The phenomenon of teaching to the test has aroused curiosity in many educators.
B．Skills in general are not only useless but often lead students astray.
C．Ability to do well on standardized tests is one thing, and ability to read and write is quit another.
D．Preparation for a test of a skill does not necessarily mean the acquisition of that skill.

A．are too much. concerned with grades
B．fail to understand the real goal of education
C．lack proper practice in phonic and grammar drills
D．are unable to understand what they read, although they do reasonable well on standardized tests