CXD逻辑35,N哥请进!

Students can learn mathematics only by exploring it on their own,with generous room for trial and error.For what matters in the long run is not acquiring particular computational skills(since without constant use skills rapidly fade),but knowing how to find and use suitable mathematical tools whenever they become necessary.
If the position expressed above is correct,then each of the following can be true EXCEPT:
a) Mathematics teachers are often afraid that someone will ask a question that they cannot answer,and this insecurity frequently leads to authoritarianism in the classroom
b) Prospective teachers should themselves learn mathematics as a process of constructing and interpreting patterns,of devising strategies for solving problems,and of discovering the beauties and applications of mathematics.
c) Political leader must accept responsibility for coordinating a nationwide plan for all levels of instruction if mathematics education is to improve
d) The most effective methed for teaching students mathematics is for teachers to state teh definitive rule for solving exercises of a given type and then to insist on rote practice in its proper application
e) Most current teaching presents mathematics as eatablished doctrine,stressing the production of right answers rather than the ability to communicate reasons.
a,b,c,e选项无关它们扯了一些与题无关的事情，是否可以作为选项？如果不是对的就是错的，但为什么它们会处在对或错之间呢