Which of the following would constitute an act of investment by a household, as economists use the term?

A) building a new construction vacation home
B) purchasing 100 shares of Microsoft stock
C) buying a corporate bond
D) borrowing money from the bank to pay for a vacation cruise

Investment, in economic terms, refers to the creation of new capital goods, structures, or inventories. Building a new construction vacation home fits this definition as it involves the creation of a new asset. Purchasing stocks or bonds or borrowing money for consumption (like a vacation cruise) does not constitute investment in this context.