A real estate investment trust (REIT) is required to invest what percentage of total assets...

Step by Step Explanation:

REIT Requirements: REITs must invest at least 75% of their total assets in real estate to qualify for favorable tax treatment under IRS regulations.

90% Rule: Refers to the distribution requirement for taxable income, not asset allocation.

100% Rule: There is no requirement to allocate 100% of assets to real estate.

IRS Publication 542 (Real Estate Investment Trusts): IRS REIT Guidelines.