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For the scenario, determine if the contractual agreement is valid and what is $"$at play" related to agreement between parties.

Lucy agrees over the phone with Daryl to sell him $$the pretty necklace in the window$$ in Lucy$$s pawn shop. Lucy sends Daryl the wrong necklace from a different window.

Not valid $-$ Undue influence

Not valid $-$ Fraud in the execution

Not valid $-$ Duress

Valid