Earth's crust is made of rock, and rock is made of natural substances called minerals. There are three main types of rock: sedimentary, igneous, and metamorphic rock. Each type is produced in different ways. The oldest rocks on Earth were formed about 3.8 billion years ago.
18% of 400 is 72
Hope it helped
I am pretty sure it is D. confucius lived during the Zhou dynasty and from what i have read the dynasty sounds pretty peaceful
