Yes, it is possible to remove survey response options and sub-options.
Within the Survey Builder view, scroll down to the Options section where you can see all of your configured survey options.
Click on the trash can symbol to the left of any survey option or sub-option to remove it:
You will then need to click on the Save Survey button at the top of the Survey Builder screen. If you do not click on the Save Survey button, then your changes to the survey options will not be saved:
If you have any issues with adding or removing survey options, then please do get in touch.