The majority of people who fail to accumulate money sufficient for their needs, are generally, easily influenced by the opinions of others. They permit the newspapers and the gossiping neighbours to do their thinking for them. Opinions are the cheapest commodities on the earth. Everyone has a flock of opinions ready to be wished upon by anyone who will accept them. If you are influenced by opinions when you reach decisions, you will not succeed in any undertaking.

What is the main idea of the passage?

The correct option is: People should not be influenced by the opinions of others.

Step-by-Step Explanation:

1. Analyze the Premise:
The passage starts by identifying a common trait among people who fail to accumulate sufficient money: they are "easily influenced by the opinions of others" and let external sources (newspapers, neighbors) do their thinking for them.

2. Examine the Characterization of "Opinions":
The author describes opinions as the "cheapest commodities on the earth," suggesting they are easily acquired, abundant, and often of low value or reliability.

3. Identify the Direct Warning/Conclusion:
The final sentence of the passage delivers the core message and warning: "If you are influenced by opinions when you reach decisions, you will not succeed in any undertaking." This explicitly establishes that being influenced by others' opinions is a barrier to success.

4. Evaluate the Options:
- "People should accumulate as much money as they can.": This is incorrect because accumulating money is merely used as an introductory example of failure, not the main lesson.
- "People should neither give nor accept the opinions.": This is too broad and absolute. The text warns against being *influenced* by opinions during decision-making, rather than forbidding the general exchange of ideas.
- "People will succeed in any undertaking if they do not accept any opinion at all.": This is an overstatement and logical fallacy. Avoiding opinions does not automatically guarantee success; rather, the passage states that being influenced by them guarantees failure.
- "People should not be influenced by the opinions of others.": This directly summarizes the author's primary thesis and concluding warning that one must avoid being influenced by external opinions to succeed in their decisions.