I would say the answer is B
I believe the answer you are looking for would be the second answer choice, "We read Shakespeare's tragedy, <em>Othello</em>, after reading two of his comedies."
This is because when information already speaking of something mentioned, is referred to to clarify a subject, it must be separated by commas. (that's how I remember)
ex: My mother, the queen, is placing a new law down to make everyone have equal rights.
ex: Today I went to Ms. Green's, the principal's, office.
<u>Answer:</u>
<em>The EPA and NASA were formed as an </em><u><em>executive agency
</em></u>
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<u>Explanation:</u>
NASA was shaped in 1958 when Congress passed the National Aeronautics Act while EPA describes the Protection of Environmental Agency. President Richard Nixon formed it in 1970 through an official request.
Both the EPA and NASA were framed as official organizations under the influence and backing of the U.S. Government. This implies they work under the offices in mid-1970, because of increased open worries about breaking down city air, common regions covered with garbage, and urban water supplies tainted with risky debasements.