Answer:
The first person to map the Milky Way Galaxy using radio waves was <em>Karl Jansky.</em>
<em>hop</em><em>e</em><em> it</em><em> helps</em><em>!</em>
The answer is D when citing a bibliography
The answer would be hearkens which means "to listen"
Hope this helps! :)
A. after the beginning of the Christian Era
