The correct answer is D.
The Internet is a unique technological invention of the modern era developed and opened to mass use since the 1990's. Before this period, the situation of a Japanese student practicing English with Irish students through the internet would have been impossible. On the other hand, all of the other options could be situated in modern or pre-modern times indistinctly.
<h3>Because of Douglas's political stature, the campaign attracted national attention. Its outcome, it was thought, would determine the ability of the Democratic party to maintain unity in the face of the divisive sectional and slavery issues, and some were convinced it would determine the viability of the Union itself.</h3>
<h2><u>please</u><u> </u><u>mark</u><u> </u><u>in</u><u> </u><u>brain</u><u> </u><u>list</u><u> </u></h2>