Which Statement About Assessment of Students with Visual Impairments Is

Which statement about assessment of students with visual impairments is correct?

A) Assessment is based on a battery of tests that have been normed on the population of children who have visual impairments.
B) Assessment is made especially difficult by the lack of standardized assessment instruments for this population.
C) Assessment should be performed immediately before these children begin school.
D) Assessment is facilitated by the similarities and common patterns of behavior exhibited by this group.