Four Students Came Across a Photograph of a Painting on the Internet

Multiple Choice

Four students came across a photograph of a painting on the Internet that they wish to use in their respective reports.Who has best practiced the ethics of intellectual property rights in using it?

A) Leslie,who sent a WhatsApp message to the photographer.Though she did not receive a reply,she mentioned the name of the photographer in her report.
B) Tom,who spoke with the photographer and got his oral approval to use the photograph.He mentioned the photographer's name in his report.
C) Ina,who left a voice mail message with the photographer and subsequently sent an email informing the photographer she had called.She then mentioned the photographer's name in her report.
D) Clarence,who sent an email to the photographer and got his written approval,which he preserved.He mentioned the photographer's name in his report.