Alexandria Is a Fifth Grader Who Is Inconsistent with Tasks

Alexandria is a fifth grader who is inconsistent with tasks, has difficulty reading, and appears unmotivated. One reason why her learning disability is difficult to identify is that

A) this is an invisible disability
B) her inconsistency makes her teacher believe that she does not have a learning disability
C) her lack of motivation is due to years of frustration and failure
D) all of the above