In this sentence, the author says that even though economic researchers are against the notion of medical practitioners overusing the expensive tents. The physicians may sometimes request for that the tests be conducted in order to avoid being sued.

Option A:- INCORRECT
This option is wrong because the use of 'to avoid' makes the sentence seems ambiguous

Option B:- INCORRECT
It is wrong because the sentence makes it seem as if the act of performing the test instead of the result of the test

Option C:- INCORRECT
The option is wrong because it changes the intended meaning of the sentence by saying that the performance of the test is what is necessary to avoid suing whereas the result of the test is what is necessary.

Option D:- INCORRECT
It seems really ambiguous . The use of 'there be' makes the sentence sound grammatically incorrect

Option E:- CORRECT
there's the correct use of the subjunctive 'that' to explain that the test are meant to be carried so as to get results to avoid being sued.

Option A:- INCORRECT
This Option is wrong because the use of to avoid' makes the sentence seem ambiguous.

Option B:- INCORRECT
The sentence in this option makes it seem as if the act of performing the test instead of the test result.

Option C:- INCORRECT
This Option change the intended meaning of the sentences

Option D:- INCORRECT
This option is ambiguous. The use of 'there be' makes the sentences

Option E:- CORRECT
There's the correct use of the subjunctive 'that' to explain the intended meaning of the sentence.
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