Which of the following statements is true of productlines?
a. They limit the productchoices offered to customers to one or two product items.
b. They provide economies ofscale in advertising.
c. They require greatertransportation and warehousing costs than product items.
d. They increase a firm'smanufacturing and inventory costs.

Which of the following statements is true of convenienceproducts?
a. They are shopping productsthat are not actively sought after by consumers.
b. A consumer is unwilling toshop extensively for convenience products.
c. A consumer is unwilling toaccept other substitutes for convenience products.
d. They are shopping productsthat are perceived to be similar in features.