frank thought the check cashing system was\nflawless and impenetrable.\nclumsy and vulnerable.\nmediocre but…

frank thought the check cashing system was\nflawless and impenetrable.\nclumsy and vulnerable.\nmediocre but not manageable

frank thought the check cashing system was\nflawless and impenetrable.\nclumsy and vulnerable.\nmediocre but not manageable

Answer

Brief Explanations:

The text states Frank thought the check - cashing system was clumsy and vulnerable.

Answer:

clumsy and vulnerable.