A breach of contract may occur when a party performs which of the following actions?

A breach of contract occurs when one party fails to fulfill its obligations under the agreement, and this can happen in several ways. When a party prevents the other from completing their duties, it disrupts the contractual obligations and thus constitutes a breach. Similarly, failing to make a progress payment on time can impede the agreed-upon terms of the contract and can also lead to a breach. Additionally, outright refusal to perform the terms of the contract is a clear indication of non-compliance, further illustrating a breach.

Since all these actions directly interfere with the contract's fulfillment, identifying them collectively highlights that any of these scenarios can result in a breach. Therefore, the answer indicating that all of the actions listed can result in a breach is correct, as each one demonstrates a way in which the contract can be jeopardized. This understanding is crucial for anyone involved in contract agreements, ensuring awareness of various ways breaches can occur and the consequences that may follow.