On April 16, 2007, BBC news reported the results of a study done by Dr. David Lewis of the Mind Lab in the United Kingdom. Dr. Lewis found that eating dark chocolate had longer lasting excitatory effects on the body than did kissing a romantic partner. From his statement, it is evident that Dr. Lewis:.
A) Rejected the null hypothesis.
B) Proved the research hypothesis.
C) Failed to reject the null hypothesis.
D) Accepted the research hypothesis

A

Explanation:

Rejected the null hypothesis.

When the null hypothesis is rejected in a research or case study, it is concluded that the hypothesis for such research study is false.

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