Delete Recovery Drive D

I just serviced a Gateway SX2110G desktop for a friend. Version 21H2 19044 1889. It just needed a decent tune-up.
Usually, I recommend creating a system image backup but as usual so many times, the user wasn't interested.
Then I asked the user about creating a USB Recovery Drive. No time was the answer.

Well, I started the process to create a USB Recovery Drive anyway. The user asked me what I was doing.

I told the user, when I service a PC, I finish up with either a system image backup or a USB Recovery Drive unless it isn't necessary to do so. If you don't decide, I will. The reason is when there isn't boot media available to troubleshoot issues or recall an image backup, now's the time to implement either one of them or another reliable choice.

Moving on, when the USB Recovery Drive completed, it provided a link to delete the Recovery [D:].


I chose not to do it as I wanted to find out how much space it takes up.
I've seen the link to delete Recovery drive before but never followed up on it: it's about time I do.
Since it takes up 14.53 GB, I want to delete it.
Since I'm not really adept at managing partitions I need to know if an unallocated space will be left.
If so, will I be able to merge the 14.53 GB space to Gateway [C:]?

So now is the time to address the No time answer, I said to my friend now we both have time to go to the Blue Moon: let's go.