Answer:
Because the cross is what Christians believed Jesus died on before he was resurrected.
The people of Sumer are among the earliest denizens of Mesopotamia. By about 4000 BCE, the Sumerians had organized themselves into several city-states that were spread throughout the southern part of the region. These city-states were independent of one another and were fully self-reliant centers, each surrounding a temple that was dedicated to god or goddess specific to that city-state. Each city-state was governed by a Priest King.
Positive Effects-
A. Gaining an understanding of
foreign customs and beliefs
C. Choice of different types of food
Negative Effects-
B. Fears about loss of a national
cultural identity
D. Fear or hostility toward
other cultures
I believe the answer is: valid, but not reliable
A result would be considered as valid if it is created by using proper logical thought or common way of reasoning. But, such result on personality would not be considered to be reliable because there are too many factors that could create a deviation within the data, and there is no accurate way to truly measure personality.