Effortful Processes, Which Have Also Been Called Strategies or Control

Effortful processes, which have also been called strategies or control processes, are hypothesized to do all of the following except:

A) to have limited availability to consciousness.
B) to interfere with the execution of other effortful processes-that is, to drain mental resources.
C) to improve with practice.
D) to be influenced by individual differences in intelligence, motivation and education.