Final answer:
The statement that is an appeal to sympathy is Option c: 'I know how badly the loss of a loved one hurts. So, let's fund this medical research.'
Step-by-step explanation:
The statement that is an appeal to sympathy is: c. I know how badly the loss of a loved one hurts. So, let's fund this medical research. This statement appeals to the reader's emotions by invoking the personal experience of losing a loved one, which elicits sympathy and compassion. By using this appeal, the writer attempts to persuade the reader to support the funding of medical research.