Comprehensive and Detailed Explanation:

Migrating OIC integrations across instances for data sovereignty involves exporting and importing design-time metadata (e.g., integrations, connections) using Oracle Cloud Infrastructure (OCI) Object Storage. Let’s dissect each task with exhaustive detail:

Option A: Enable public visibility for the Object Storage bucket.

Not Required (Answer):Public visibility is unnecessary and insecure for this process. OIC export/import jobs use pre-authenticated requests or IAM policies to access a private bucket, ensuring data security. Making the bucket public exposes sensitive integration artifacts (e.g., connection details) to unauthorized access, violating sovereignty and security best practices. For example, a bucket storing HR integration metadata should remain private, accessible only via OIC credentials.

Option B: Create a dynamic group.

Required:A dynamic group in OCI groups OIC instances, allowing them to access resources like Object Storage via IAM policies. For instance, you’d define a rule like ALL {instance.compartment.id = 'ocid1.compartment...'} to include your OIC instances, granting them bucket access without static credentials. This is a foundational step for secure automation.

Option C: Create export and import jobs.

Required:In the OIC console, you explicitly create export jobs to generate archive files (IAR/PAR) and import jobs to ingest them into the target instance. For example, exporting an “HCM-to-Salesforce” package creates a PAR file, which the import job then processes in the new region. This is the core mechanism of migration.

Option D: Construct the storage URL for an Object Storage bucket.

Required:The OIC export/import process needs the bucket’s URL (e.g., https://objectstorage.us-ashburn-1.oraclecloud.com/n/namespace/b/bucket/o/) to locate and store/retrieve archives. You construct this in the OCI console or via CLI, ensuring OIC knows where to read/write files.

Why A is the Answer:Public visibility isn’t part of the standard workflow and contradicts security principles, especially for regulated data. Private access via IAM and pre-authenticated URLs suffices.

Edge Case:If a third-party tool needed public access (unlikely), it’d still be a non-standard, risky workaround.

Use Case Example:Migrating a private bucket of integrations from US to EU region uses B, C, D, but not A.