O$1$ MC$2\mathrm{.}9$ What is the key difference between periodic accounting earnings and cash flows?

a$.$ End$-$of$-$period accounting adjustments $($e$.$g$.-$ interest$).$

pg$.2\mathrm{.}16$

b$.$ Accounting accruals $($e$.$g$.,$ depreciation and accounts receivable$).$

c$.$ The cash$-$to$-$cash cycle explains the timing differences of when cash is received and paid.

d$.$ No difference as accounting earnings and cash flows are the same.