In a classified balance sheet, assets are usually classified as:
(a) current assets; long-term assets; property, plant, and equipment; and intangible assets.
(b) current assets; long-term investments; property, plant, and equipment; and common stock.
(c) current assets; long-term investments; tangible assets; and intangible assets.
(d) current assets; long-term investments; property, plant, and equipment; and intangible assets.