D - the earth is dynamic and constantly changing
There are seven quintillion five quadrillion grains of sand on all the beaches of the world. The exact number is not known.
I think B or C. :) is the answer.
Patent law in the US is the Patent Act. It protects new inventions and establishes the US Patent Office to accept patent applications. Its authority is from the US Constitution which says "Congress shall have power to promote the progress of science and useful arts, by securing for limited times to authors and inventors the exclusive right to their respective writings and discoveries."
