Expression: business relationship null and void

[Nedoym]

English Language Tests, Intermediate level

ESL/EFL Test #406 "English Slang Idioms (141)", question 5

"I just can't trust you to deliver on your promises, so I have found a different supplier. You can consider our business relationship ......... and void, Jack," Ken said.

(a) closed
(b) ended
(c) erased
(d) null

English Language Tests, Intermediate level

ESL/EFL Test #406 "English Slang Idioms (141)", answer 5

"I just can't trust you to deliver on your promises, so I have found a different supplier. You can consider our business relationship null and void, Jack," Ken said.

Correct answer: (d) null
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what is the right answer?

Nedoym

[Linda]

(D) is the right answer. "Null and void" refers to something that no longer exists or "No longer valid or enforceable."
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