Costs which are always relevant in decision making are those costs which are: a. variable b. avoidable c. sunk d. fixed

B. Avoidable

Explanation:

A relevant cost is a cost that only relates to a specific management decision.  This means that a relevant cost is a cost that differs between alternatives being considered . Fixed , Variable and Sunk cost will always exists so they are not relevant when comparing two alternatives.

Avoidable costs,  will exists if we choose a particular alternative. So it's relevant for your decision.

a. money supply  

have a good day

credit history is used by lenders to determine whether you are a 'risky' person to give their money to.

having a short history provide very little data for the lenders. they wouldn't be able to determine your credit behavior from such a small samples. even if they are perfect.

having long credit history with few blemishes provide larger and more accurate data for the lenders to predict your credit behavior.