Answer:
B
Step-by-step explanation:
I think the attached below can support for your question to be answered!
Choose B. Ask every tenth customer over the period of one week.
Because:
a. Ask every fifth male customer : the costumer can be female
c. Ask every customer who orders a vegetarian entrée, of course, they will 100% oder garden salad so the sủvey result will be incorrected
d. Ask every fifth customer who orders a chicken sandwich.. It means they like chicken and this customer group does not represent the common sample.
e. Ask every customer to flip a coin. If the coin shows heads, ask for the customer’s opinion, Eating preferences are not related to luck
