Forecasting models can be divided into three groups. They are: a. time series, optimization, and simulation methods b. judgmental, random, and linear methods c. linear, non-linear, and extrapolation methods d. judgmental, extrapolation, and econometric methods

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

a would be the answer

answer; (b) knowledge based summaries of our beliefs and feeling about the self in particular domains;

i believe the answer is: description

description refers to the goal of psychologist to identify the phenomenon that being observed. this goal is being actualized by collecting data/information from various clues that observed through the phenomenon. this goal must be accomplished before pyschologist able to create methods of treatment.