To test the trigger with 200 account records with unique names using the least amount of code:
Option A: Use Test.loadData to populate data in your test methods.
Reference:
"Test.loadData lets you populate test records by loading the contents of a CSV file into sObjects for use in test methods."
- Apex Developer Guide: Using Test.loadData
Option B: Create a static resource containing test data.
"Create a static resource that contains the .csv file for the records you want to load."
- Apex Developer Guide: Loading Test Data from Static Resources
Why Other Options Are Incorrect:
Option C: The @isTest(isParallel=true) annotation is used to run tests in parallel but does not help in creating test data.
Option D: Using @isTest(seeAllData=true) allows access to existing org data, which is not recommended and does not help create unique test data with minimal code.