Answer:
D
Explanation:
It explains simply <em>what </em>the circulatory system does, and then it tells the reader what Arturo will be discussing <em>about</em> the circulatory system.
One basic obstacle for the new round of talks over Iran’s nuclear program that open today will be America’s basic distrust of the Iranian regime. Before striking any deal with Tehran, the Obama Administration will have to gauge whether a country where hostility toward the U.S. has been a core political theme since 1979 is acting in good faith. That could be a hard notion to swallow, given that some Iranian leaders still call America the Great Satan, and that Iran still celebrates the 1979 takeover of the U.S. embassy in Tehran with a national holiday.
that would be true because guidewords are located at the top of a dictionary page.
Choppy broken up sentences
