The Phrase "Ironic Effects of Mental Control" Means That

The phrase "ironic effects of mental control" means that

A) we have difficulty on a Stroop task, because we pay attention to meaning, rather than ink color.
B) ironically, we often make more errors on a familiar attention task than we make on an unfamiliar attention task.
C) when we try to avoid a particular thought, it may be even more likely to enter consciousness.
D) we often cannot introspect accurately about the cognitive processes we use in everyday life.