Answer: B. to provide evidence that the age of discovery is concluding
Explanation: in the given statement the author says that with the discoveries regarding the quantum, the DNA and computers, the basic (and most necessary) laws of matter (quantum), life (DNA) and computation (computers) are already solved, so according to this infromation, we can see that the author's purpuse in this statement is to provide evidence (examples) that the age of discovery is conluding.
<span>D. Sending the letter to the publication by following the directions listed on that publication’s website is the action that best describes the publication stage of writing a letter to the editor, as all of the other activities should have occurred prior to seeking publication.</span>