Thyimach, a machinery manufacturing company, has been purchasing iron shafts from Metaljun, a supplier of iron and steel materials, for over a decade. When Thyimach designs new models of machinery, Metaljun manufactures shafts with new specifications without asking for advance payments. Thyimach, in turn, uses only Metaljun's materials to manufacture its machinery. In the context of the supplier component of a specific environment, this scenario best illustrates _____ between Thyimach and Metaljun.
A) anti-competitive behavior
B) opportunistic behavior
C) relationship behavior
D) dissonant behavior