What is the most important kind of validity for achievement tests?

What is the most important kind of validity for achievement tests?
 
  A) Construct
  B) Predictive criterion-related
  C) Concurrent criterion-related
  D) Content

Ques. 2

It is apparent from research studies that
 
  A) diagnostic achievement tests are better than multiple-skill achievement tests.
  B) different curricula result in different performance on different achievement tests
  C) achievement tests, in general, are inferior to teacher-made tests
  D) we know little about achievement testing in the schools.

Ques. 3

The major difference between the WIAT-II and WIAT-III is
 
  A) the subtests are designed to measure the eight areas of learning disability defined in IDEA 2004
  B) it is linked to the Wechsler series of intelligence tests
  C) it has evidence for validity based on test content, internal structure and relations with other measures
  D) it can now be group-administered