Magali and Jean-Gabriel have been asked to design a study investigating happiness across the lifespan. They decide their study will involve going to the mall and having conversations with people of a...

Magali and Jean-Gabriel have been asked to design a study investigating happiness across the lifespan. They decide their study will involve going to the mall and having conversations with people of a variety of ages to find out if they are happy or unhappy. What is themost serious flaw of this design?

A) They have not defined happiness or how it will be measured.