Question

The Laffer curve, though a subject of ingoing debate
A. , suggests that there exists an optimal tax rate at which
B. tax revenue is maximized, beyond which
C. higher tax rates may lead to diminishing
D. returns due disincentives for economic activity E.

Q: Answer-The Laffer curve, though a subject of ingoing debate A. , suggests that there exists an optimal tax...

In Returns due a preposition is missing. The correct way should be returns due to. Due to expresses a cause or a reason. In the emboldened part ingoing should be replaced with ongoing that means current or present.

Given below is a sentence divided into five parts. One of the parts is emboldened and the part is erroneous
i.e it contains a grammatical error. You need to find one more part from the options given below that contains the error.

A suggests that there exists an optimal tax rate at which

B tax revenue is maximized, beyond which

C higher tax rates may lead to diminishing

D returns due disincentives for economic activity

E All are correct

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