Explain why the ketal shown below does not undergo the mechanism of acid-catalyzed ketal hydrolysis. (Hint: Write the reaction mechanism like the reaction would occur and analyze the intermediates formed.)

The intermediates formed are resonance-stabilized, making the forward direction unfavorable.

The intermediates formed are already stable and resist undergoing another reaction.

The intermediates formed are highly unstable, making the forward direction unfavorable.

The intermediates formed are highly reactive and react with one another instead.