Answer:
D. Time, Harvard
Explanation:
A proper noun is defined as the 'name of a particular person, place, organization.'
Time is the name of an American weekly news magazine.
Harvard is the name of a private Ivy League research university in the USA.
Answer:
D.
Explanation:
The words issue, researchers, cancer in answer choices A, B, and C are common nouns. The correct choice would be D.