It's C, since that's what the 6th Amendment states, I believe.
The OPEC also known as the Organization of Arab Petroleum Exporting Countries proclaimed an oil embargo in the 1972. This was a result of US' support for the Israel during the Yom Kippur War. The embargo caused oil prices to rise fro dollars a barrel to near 12 dollars globally. It gave rise for US to develop its own oil generating capacity to sustain its energy sources.
Stones. Stones were not only the building blocks being used to create pyramids, they served as important tools as well. The two main stone types used in construction were limestone and granite. Low-grade limestone was used in creating the inner walls, while smoother white limestone was used on the outer walls.
They weren't able to make efficient crops and to eat