Which of the following scenarios best exemplifies a Straight Rebuy buying situation in the context of business$-$tobusiness $($B$2$B$)$ transactions?

Company $C$ is renegotiating the terms of a contract with its current IT service provider.

Company $A$ is purchasing software for the first time to improve its internal communication systems.

Company B regularly orders office supplies from the same supplier without cqusidering alternatives.

Company $D$ is modifying the specifications of a manufacturing component and seeking bids from multiple suppliers.