Wanner Warned Some Subjects,but Not Others,that They Would Have to Recall

Wanner warned some subjects,but not others,that they would have to recall a set of instructions.The results of the study showed that:

A) warned subjects retained a nearly verbatim copy of the instructions,while unwarned subjects had very poor memory.
B) unwarned subjects could not retain either the detail or the gist of the instructions.
C) memory is better for changes in wording that affect meaning than for changes that affect style.
D) memory for changes in wording is equally good,whether the changes affect meaning or style.