__________ is the stage of sleep in which sleep spindles and K complexes are likely to occur

The "Flynn effect" refers to

A) the finding that IQ scores have stayed the same over the last decade. B) the finding that IQ scores have steadily increased over the last decade. C) the finding that IQ scores have steadily decreased over the last decade. D) the finding that IQ scores are negatively correlated with education levels.

When a lower animal like a rat is frightened, it will assume a defensive physical crouch will remain motionless until the fear has passed. This is a defensive reaction called posturing

Indicate whether this statement is true or false.