Answer: D- it was difficult to know who the enemy was.
Explanation:
Before i answer in what era or time
<span>The discovery of some tombs which is important to archaeologists' understanding of ancient Egypt is the discovery </span>that the people who built the pyramids were paid workers, and not slaves. Egyptian archaeologists have discovered a set of tombs which are believed to belong to workers. Experts believe the workers died building the Great Pyramids of Giza. They were workers because the material of the tombs were made of mud brick which was commonly used for the tombs of paid workers. These tombs were built beside the king's pyramid.
Answer:
Mass and density
Explanation:
Density of an object is defined as its mass per unit volume. Mathematically, the relation is given by :

m = mass and V = volume
If we know the density of the Eraser and its mass, we can easily find its volume. Hence, the two tools are mass and density.
<span>It is B. Louis XIV was an absolute monarch, while William of Orange was a constitutional monarch.
</span>