The answer is the ego operates on the reality principle. It is
the capacity of the mind to evaluate the reality of the external
world, and to act upon it accordingly, as opposed to acting on the
pleasure principle. The ego, on the other hand, is the factor of
personality that deals with the stresses of reality.
About one-third of Europe population died within that period.
During that time, the Europe underwent a horrendous black plague infection that is incurable with the medical advancement that they had at that time. It's predicted that this pandemic resulted in more than 200 million deaths in the European continent.
The correct answer is The lack of a seaport to trade goods might put the people at an economic disadvantage
Landlocked, inland or inland countries
Thus are known in the 'concert of nations' the 44 countries that have no outlet to the sea. In common, besides geography, poverty, the difficulty of doing trade, expanding its presence in the world, winning markets, etc. In Europe, only five of these countries have managed to get rid of poverty, but three of them have had to take serious risks in their banking systems so that, like the oceans, they attract wealth. We speak of Switzerland, Liechtenstein and Luxembourg. The other two European countries are Austria and San Marino. Africa contributes 16 more; Asia, ten; and South America, two more, Bolivia and Paraguay.
The answer is the third one!! :)
I believe the answer is: Darlene
Formal operational thinking is distinguished by the ability to think about an abstract concept and implement it in order to solve a certain problem. This could be shown in Darlene's method of teaching which seems to be based on a concept that students are much more likely to understand the subject if the teacher directly involved in the process.