Answer:
For review > Filter for Matched transactions
Step-by-step explanation:
The whole question is a multiple choice answer. 
How can you view all downloaded banking transactions for which QuickBooks Online thinks it has found a potential match? 
For review > Filter the Bank Register 
For review > Filter for Recognized transactions 
For review > Filter for Rule applied 
For review > Filter for Matched transactions 
For review > Filter for Transferred transactions
Obviously, it's pretty simple we're looking for matched transactions.