Final answer:
Wallechinsky refutes the argument that people are secure once they have achieved many aspects of the American Dream by highlighting the growing unease among survey respondents despite their achievements.
Step-by-step explanation:
The opposing argument that Wallechinsky is refuting in this example is:
A) That people are secure once they have achieved many of the things associated with the American Dream.
In the passage, it is mentioned that although the respondents in the survey have achieved many aspects of the American Dream, such as full-time employment, good health, satisfying religious or spiritual life, home ownership, and multiple cars, there is a growing unease among them due to factors like increased healthcare costs and cuts in overtime, raises, or bonuses. This suggests that achieving these aspects does not guarantee security and prosperity.