How to find my application use standard encryption limited to within Apple's operating system?

Question

I'm trying to submit an update to our application (Xamarin iOS) into appstore and I'm facing a new prompt related to encryption export compliance.

In our application, we are encrypting and decrypt using the AES and RFC2898 algorithm and we use HTTP protocol for uploading and downloading the file and StoreKit API for in-app purchase.

For your reference,

In Appstore, we facing the below prompts,

1. What type of encryption algorithms does your app implement?

Question:

1. In the above question, which option do we need to choose?
2. AES and RFC2898 algorithms, HTTP protocol, and StoreKit API, These encryption are all limited within the Apple operating system?

Thanks in advance.