What Is the Meaning of the Net Position Component Called

What is the meaning of the net position component called "net investment in capital assets" (which appears in proprietary fund financial statements) ?

A) Total of capital assets of the proprietary funds less accumulated depreciation
B) Total of capital assets of the proprietary funds
C) Total of investments that are dedicated to purchase capital assets
D) Total of capital assets of the proprietary fund less accumulated depreciation less outstanding balances of bonds, notes, or other borrowings, issued to acquire, construct, or improve the capital assets.