Which statement correctly summarizes triglyceride storage in adipose tissue and their role in energy supply during fasting?

• A. Triglycerides are instantly converted to glucose in adipose tissue and released as blood glucose, which is the sole mechanism by which stored fat provides energy during fasting.
• B. Triglycerides are stored in aqueous vacuoles inside muscle fibers where they are permanently unavailable for energy use, serving only as insulation.
• C. Triglycerides are stored exclusively in the liver as membrane components and cannot be mobilized for systemic energy, so they do not contribute to fasting energy supply.
• D. Triglycerides are stored in adipocytes as large lipid droplets and are mobilized by lipolysis to provide fatty acids for energy when dietary intake is insufficient.

Answer: (D)