Answer:
a. attempt to cure the defect
Explanation:
Based on the information provided within the question it can be said that Fruit of the Plant can attempt to cure the defect. This is because time for performance of a contract refers to the amount of time in which one party must meet the agreed upon requirements of the contract. Therefore since that time has not yet expired for Fruit of the Plant, then they can try something else to make up for the missing high quality grain seed that Grange Co-op will accept.