Final answer:
Laura may be liable under the doctrine of pre-incorporation contracts, and Wormwood Windows, Inc. could also be liable if it adopted the contract after formation.
Step-by-step explanation:
Stephanie can assert that Laura may be personally liable for the performance of the contract despite the subsequent formation of Wormwood Windows, Inc. Under the legal doctrine known as pre-incorporation contracts, individuals who enter into contracts on behalf of corporations that have not yet been formed are personally liable for those contracts. Since Laura signed the contract 'for Wormwood Windows, Inc.' before the corporation was legally formed, Stephanie can argue that Laura acted as a promoter for the non-existent corporation and is therefore personally liable for the contract's obligations, including the express guarantee. Additionally, Stephanie could also assert that the corporation may be liable if it implicitly or explicitly adopted the contract after it was formed, especially since Laura deposited the full contract amount into the corporation's account, which can be seen as an affirmation of the contract by the corporation.