The Z scores of two tests scores are + 1.2 and + 1.5 . To obtain the area between these scores

The Z scores of two tests scores are + 1.2 and + 1.5 . To obtain the area between these scores
 
  a. subtract the Z scores and find the area of the difference in the Z score table
  b. find the area between each score and the mean in the Z score table and then subtract the smaller area from the larger area
  c. find the area between each score and the mean in the Z score table and then subtract the difference between them from 100
  d. find the area beyond each score in the Z score table and subtract the difference between the areas from the mean