Current Attempt in Progress

An auditor is testing accounts receivable for a client that has $1,000$ customers with customer balances that range from $$150$ to

$$185,000.$ The auditor subdivided the receivables into three groups: group $1$ has all customers with receivable balances between

$$185,000$ and $$100,000,$ group $2$ has all customers with receivable balances between $$100,000$ and $$25,000,$ and group $3$ has all

customers with receivable balances less than $$25,000.$ The auditor then randomly selects customers out of each group. This is known

as:

random selection.

haphazard selection.

block selection.

stratified sampling.