Advertising can:
a) manipulate customers into buying a product.
b) raise the cost of producing a product.
c) assure a product does not fail.
d) prevent economies of scale in manufacturing.
e) increase demand for the product.

The answer is e) increase demand for the product

Explanation:

Advertising can increase the demand for a product in the log run by continually and consistently promoting the brand and product awareness of the product in the mind of the customer/consumer.  

Moreover, effective advertising may lead up to the economies of scales over time. And economies of scale in return, influences effective and cost saving advertising.

Marketing can never "Assure" that a product will succeed! No one can!

answer; (a) conduct a worksite inspection;