In a Clever Demonstration of the Ironic Effects of Mental

In a clever demonstration of the ironic effects of mental control, Wegner had people try to hold a pendulum steady over a target. Some participants were instructed to hold the pendulum steady and some were instructed not to make any sideways movements. Results showed that

A) people made more sideways movements when they were specifically instructed not to do so and that these effects were magnified in a mental load condition.
B) the mental load condition reduced the effects of instructions not to make sideways movements.
C) the instruction not to a make a specific movement produced less movement than instructions just to hold the pendulum steady.
D) a physical mental load (holding a brick) improved performance while a mental load (counting backwards from 1000) impaired performance.