A. <span>The conquest of Constantinople, the famous capital of the Byzantine.</span>
They were first used as evidence in 1892.
Yes, I think that identifying the purpose would increase the credibility of the source, so if we understand the "should" here as "would be good if, is recommended" - then this statement is true.
Including the intent of the information in the source will help place the information in a wider context - and often the context is necessary to fully understand the content of a source.
They are east of the Marshalls if you only need one of the answers here.
On the lower layer of asthenosphere! Its a floating area of molten rock:) Hope this helps.