Which of the following best describes the likely results of this search?
Sources that reference the first two terms and exclude the third
Sources that reference the first two terms and the third
Sources that reference the first term and either of the remaining two
Sources that reference either of the three terms

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

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).

pretty sure a is right

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.