All of the above as children could reach in to small spaces and kids could work more for less pay and adults are more likely to not do it due to the risks
Since Russia had an alliance with Serbia, it ordered its forces to mobilize for war. it wasn't a formal alliance, but it did specify that if someone declared war on Serbia, Russia would also step in. This resulted in other countries also getting involved in the war. The answer would be D!
-TetraFish
The Continental Congress named f*** member commission to negotiate a treaty John Adams, Benjamin Franklin, John jay, Thomas Jefferson, and Henry Laurens
There was the compass and the astrolabe