<span>Unlike primary source, a secondary source can be : B. written or created by an educated person or trained expert
In order to be categorized as a primary soruce, the surce must be directly involved and exist when the event/occurence is happening. Secondary source could be anything as long as it related to the event</span>
<span>Trade in the High Middle Ages
</span><span>Population Growth in the Middle Ages
</span><span>Technology Drives Growth
</span><span>New Methods of Land Use
</span><span>Mining and Heavy Industry
</span><span>Development of Urban Centers</span>
Answer: I'm pretty sure it's A, but don't quote me on that, sorry.
Explanation:
Blue gemstone: A gem stone, that is blue.