The word "holistic" (Line 5, Para. 3) means

A．It is still in processing and lots of difficulties have not been resolved.
B．Its accuracy is still unsatisfactory and improvement is needed.
C．It is hard for the program to identify Washington's papers.
D．It can learn from the success of voice recognition software.

A．The amount of such documents is huge and hard to read.
B．Handwriting differs greatly from person to person.
C．Handwritings have never got definite digital counterparts.
D．Less people are willing to read handwritings today.