The differences between sound and form are due to the following

The differences between sound and form are due to the following EXCEPT( ).
A、the fact of more phonemes than letters in English
B、stabilization of spelling by printing
C、influence of the work of scribes
D、innovations made by linguists
【正确答案】：D
【题目解析】：参考教材P8，声音和形式的差异不包括语言学家的一些创新。