How is cost, as used in managerial accounting, distinguished from expense, as used in financial accounting?

a.

A cost is a sacrifice of resources and expenses are recorded in accounting records, but not all costs appear in accounting records.

b.

Managerial accounting deals primarily with costs, not expenses, while financial accounting primarily deals with expenses for financial reporting as defined by generally accepted accounting principles.

c.

All expenses are costs, but not all costs are expenses in the period of incurrence, even though they will become expenses in some later period.

d.

All of the answers are correct.