If you are to use [Control-c] as the interrupt key instead of [Del], then you will have to use

Answer: Option B

In Unix, the stty command is used to change or display terminal settings. The intr option is used to specify the interrupt key, which is used to interrupt or terminate the current process. By default, the interrupt key is set to ^c, which represents Control-c. So, to use Control-c as the interrupt key, you would use the command stty intr ^c.
Therefore, Option B: stty intr ^c is the correct command to set Control-c as the interrupt key.