Explanation
According to Oracle documentation1, the most efficient way to update your existing cross-validation rules when you have redesigned your chart of accounts is to use Cross-Validation Rules Import file-based data import (FBDI). FBDI enables you to import cross-validation rules from a spreadsheet template into General Ledger. You can use FBDI to create new rules, update existing rules, or delete rules. Therefore, option C is correct. Option A is incorrect because using the Manage General Ledger Security page does not enable you to update cross-validation rules. Option B is incorrect because creating Cross-Validation Rules desktop-integrated spreadsheet does not enable you to update cross-validation rules. Option D is incorrect because using the Manage Cross-Validation Rules page does not enable you to update cross-validation rules efficiently.
According to Oracle documentation2, you should create a Data Access Set that allows access to the UK Ledger to allow users with the General Accountant job role to access the UK Ledger. A Data Access Set is a security feature that defines the ledgers and balancing segment values that a user can access. You can assign Data Access Sets to users or roles using the Manage Data Access for Users page. Therefore, option B is correct. Option A is incorrect because assigning the security context value of UK Ledger to the user/role combination does not enable access to the ledger. Option C is incorrect because assigning the General Accounting Manager role to those users does not enable access to the ledger. Option D is incorrect because assigning the UK reference set to the user/role combination does not enable access to the ledger.