The accelerator principle states:

(A) If an increase in investment is expected, output will increase.
(B) If an increase in the growth of output is expected, investment will increase.
(C) If an increase in the growth of investment is expected, output will increase.
(D) Small swings in investment are associated with large swings of output.

The answer is: (D)

One reason that we observe a tight link between consumption and disposable income is:

There are strong theoretical reasons to expect that changes in wealth are responsible for changes in consumption. Nonetheless, one reason that we observe a tight link between consumption and disposable income is:
(A) Credit rationing which changes the intertemporal budget constraint for borrowers.
(B) Households attempt to smooth their consumption.
(C) Household saving provides a buffer between income and expenditure.
(D) Ricardian equivalence

The answer is: (B) Households attempt to smooth their consumption.

The fundamental inputs (also called factors of production) are

(A) land and capital
(B) land and labor
(C) land, labor, and capital
(D) land, labor, capital, and investment

The answer is: (C) land, labor, and capital
Inputs are combined with technology to produce outputs. The fundamental inputs (also called factors of production) are land, labor, and capital.