Which of the Following Is Not a Major Caution or Criticism

Multiple Choice

Which of the following is not a major caution or criticism of learning curves?

A)  Learning rates may differ between organizations.
B)  Projections should be regarded as approximations.
C)  The base time must be carefully determined.
D)  The curve may eventually tip upwards.
E)  Carryover effects may alter the learning ratE.