B. The sender's address and date are missing.
The 20th century opened with great hope but also with some apprehension<span>, for the new century marked the final approach to a new millennium. For many, humankind was entering upon an unprecedented era. </span>H.G. Wells<span>’s utopian studies, the aptly titled </span>Anticipations of the Reaction of Mechanical and Scientific Progress upon Human Life and Thought<span> (1901) and </span>A Modern Utopia<span> (1905), both captured and qualified this optimistic mood and gave expression to a common </span>conviction<span> that science and technology would transform the world in the century ahead. To achieve such transformation, outmoded institutions and ideals had to be replaced by ones more suited to the growth and liberation of the human spirit. </span>
The .gov one because .gov means “government” and it is a site with facts and already done research. A blog is just an opinion
