Under an Installment Contract, When Does the UCC Provide That

Under an installment contract, when does the UCC provide that a buyer/lessee may reject an installment of a particular item?

A) If the defects substantially impair the value of the goods regardless of whether cure is possible.
B) If the defects cannot be cured even if defects are minor.
C) If the defects devalue the property by more than 10% and if the defects cannot be cured.
D) If the defects devalue the property by more than 20% and if the defects cannot be cured.
E) If the defects substantially impair the value of the goods and if the defects cannot be cured.