What kind of customer isn’t sure if they want to buy a product perhaps because they don’t have enough information or they are simply too overwhelmed?

A. difficult customer
B. undecided customer
C. casual customer
D. decided customer

B. undecided customer

is this right

Yes, that is correct. The term "undecided customer" refers to a customer who is unsure if they want to buy a product due to various reasons such as lack of information or feeling overwhelmed.