Common obstacles or barriers of successful problem solving include all of the following except A. inferring unnecessary constraints
B. ignoring irrelevant information
C. using rigid thinking that was used to solve past problems
D. perceiving items as useful for only their original function

the answer your looking for is c. : )

b because thats the naswer i got

hello

question:

when would a new household be started?

a.when the oldest male died

b.when a man and a woman married

c.when the house could not hold everyone

d.when a child was born

answer: us d when a child was born

hope this have a great day and brainlest