The answer is B.<span>Elsie Janis
hope this helps</span>
<span><span> A.</span><span>Since ancient times, people have used waterways for transportation.
</span></span><span> B. When natural waterways are too difficult to navigate, people sometimes dig canals to provide a better means of transportation.
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<span>D. Canals are man-made waterways that change the natural landscape to meet human needs.</span>
Answer:
The Supreme Court ruled against the prevailing notion of separate, but equal. In a 9-0 decision, they held that public school segregation violated the equal protection granted to United States citizens by the Fourteenth Amendment.
Explanation:
I think it should be because diplomats is the representative of a nation and negotiating with other nations could be more easier if we're already friendly with the diplomat. Also the way we treat their diplomat is also the way of how we treat the nation he/she representing and it would add a good standing in the global status if we are respecting the diplomats.