What do Cecily and Gwendolen discover when they meet and chat over tea?

They are both engaged to Earnest Worthing.
They are both engaged to Earnest Worthing.

They like all the same foods.
They like all the same foods.

They are actually long-lost sisters.

They are actually not engaged to Earnest Worthing, but rather to two different men who both claim to have the name Earnest.