The Development of a Sense of Self Seems to Occur

The development of a sense of self seems to occur at around 18 months, at the same time as a massive number of ______ cells develop in an area called the anterior cingulate in the frontal lobe of the brain, an area thought to be responsible for monitoring and controlling ______ behaviour.

A) self; all
B) spindle; automatic
C) cingulate; intentional
D) spindle; intentional