Molly's Reach, a Regional Restaurant and Gift Shop, Has Recently

Molly's Reach, a regional restaurant and gift shop, has recently launched an increased sales campaign, particularly focused on their gift shop.To determine if their proposal is of interest,
They plan to survey a random sample of their regular customers.One member of the
Management team at Molly's Reach suggests that their survey could be conducted online.
Customers logging on to the online store would be asked to take a few minutes to complete
The survey and would be offered a coupon as incentive to participate.Which of the following
Statements is true?

A) This is a voluntary response sample.
B) This would result in an unbiased random sample.
C) This would result in a biased sample.
D) Both A and B
E) Both A and C