Achievement involves something done in a rewarding or prosperous manner, usually by will power, determination or ability. As a consequence, Mr Blutarski's want or need for accomplishment represents a motivation for him. Thus, the puts all his efforts and attitude toward a goal like competing a second PhD.
The best statement that best describes the effect nicotine has on the nervous system is it acts as a stimulant and a sedative. The correct answer is C.
