Which of the Following Describes the Main Feature of the Just-In-Time

Which of the following describes the main feature of the just-in-time system in Japan?

A) Textile firms employ subcontractors to oversee labor-intensive production and thus separate themselves from the abuses common in such operations.
B) Japanese laborers are formed into teams in which problems are solved collaboratively rather than by individuals with specialized skills.
C) Large companies employ certain members from the finance ministry in return for favors from the government, such as subsidies and financial advice.
D) Component suppliers are closely connected with assembly firms so that their products will be delivered as they are needed by the firm.