The speaker warned that the economy would hang on a thin thread if corruption continued unchecked.
Show answer & explanation
Correct answer: A
Explanation
The sentence uses an idiom to describe a precarious or risky situation.
The standard English idiom is "to hang by a thread" (not "on" a thread).
It means to be in a very dangerous or unstable state where even a small change could cause a disaster.
Therefore, the underlined part of the sentence should be replaced with “hang by a thin thread”.