T.T. Inc creates and sells hats. The Local Ironworkers 452 have contracted with T.T. Inc to purchase 150,000 hats for $15,000 with a delivery date of July 1. Local Ironworkers 452 paid a $5,000 deposit upon signing the contract, with the remaining $10,000 balance due when the hats are delivered. In the contract, Local Ironworkers 452 specified that time is of the essence due to a local union campaign. What must Local Ironworkers 452 do at this time:
a) Nothing, as the contract is still valid
b) Cancel the contract immediately
c) Extend the delivery date
d) Demand a refund of the deposit
