Answer: C) Marketing if the manufacturer did not provide instructions on how to use the ladder.
Step-by-step explanation:
The options to the question are:
A) Manufacturing since ladder may not have been intended for this use.
B) Design since the ladder may not have been made to specifications
C) Marketing if the manufacturer did not provide instructions on how to use the ladder.
D) There is no liability. The users assumes all risk in using any type of ladder.
From the question, we are informed that Barney places his new extension ladder on a slippery surface when he leans it against the wall and that as he climbs up; the ladder slips out from under him and he falls.
The type of product liability may exist in this situation is "Marketing if the manufacturer did not provide instructions on how to use the ladder".