The correct answer is letter D
Answer:
Incomplete question
Complete question; Scuba AND advancements OR technology
Which of the following best describes the likely results of this search when the following Boolean logic?
-sources that reference the first two terms and exclude the third
-sources that reference the first term and either of the remaining two
Answer: sources that reference the first term and either of the remaining two
Explanation:
The sources that reference the first term has to do with name of the author/brand/model, which is very vital in this case above. The other things that can follow are year and sector the article indicates (Technology for instance).
Answer:
A & B
Explanation:
They used their new food to increase their population and then spread their knowledge to all of Africa. More food meant bigger populations, which led to cities.
They got it from China since they had silk and porcelain there
