Explanation

All of the listed scientists won the Nobel Prize in Physiology or Medicine in 2020 for their work on Hepatitis C. Option A is correct because Harvey J. Alter was recognized for his contributions to understanding hepatitis viruses. Option B is incorrect because Michael Houghton was also part of the group awarded the prize. Option C is incorrect because Charles M. Rice was also part of the group awarded the prize. Therefore, since all three are associated with the 2020 award, D is correct.