Ans is C :
@Mauricio
Rewrite the business logic and use @TestVisible ------> @TestVisible is used to expose private methods/variables to test classes — it doesn't bypass callouts or solve DML issues.


The error message:

"You have uncommitted work pending. Please commit or rollback before calling out."

...means your code is attempting to make an HTTP callout after performing a DML operation, which is not allowed in the same transaction.

In test classes, this is especially common if:
You’re running business logic that performs DML and callouts.
The callout is real or not mocked with HttpCalloutMock.

The possible solution for the error in the test class is:
D. Rewrite the business logic and test classes with TestVisible set on the callout.

The error occurs because the test class is trying to perform a DML operation before making a callout, which is not allowed in Apex. To avoid this error, the developer should use the TestVisible annotation to make the callout method visible to the test class, and then use Test.setMock to mock the callout response. This way, the test class can verify the business logic without actually making a callout.

The other options are not correct for the following reasons:

- Option A is incorrect because the error is not related to the target endpoint or external code. It is caused by the order of operations in the test class.
- Option B is incorrect because setting seeAIIData to "true" will not solve the error. It will only allow the test class to access all data in the organization, which is not recommended for testing.
- Option C is incorrect because it uses a test.IsRunningTest() before making the callout will not bypass it in test execution. It will only return true if the code is executed by a test method.

https://help.salesforce.com/s/articleView?id=000385708&type=1...