Reference points are important in decision making

In Freudian theory, the force that energizes the personality and underlies our efforts to survive, our sexual desires, and our pleasure-seeking is known as the __________

Fill in the blank(s) with correct word

Sandy is pregnant and is concerned about the impact of illness during particular periods of prenatal development. She consults her doctor as to the __________ period during which exposure to certain illnesses would result in irreversible consequences

a) sensitive b) critical c) continuous d) discontinuous