'Rejoin' means to 'join again'; 'revolve' means 'to move in a circular motion' and 'recoil' means 'to rebound'.
'Dispute may be rejoined', 'dispute may be revolved' and 'dispute may be recoiled' do not make the sentence meaningful; hence cannot be used.
And 'dispute may be resign' is grammatically incorrect, as a participle is required after the base form of the verb 'be'.
'Resolved' means 'found a solution of' and 'dispute' means 'disagreement'. 'Trade disagreement may be getting solved without serious harm to the global economy' is what the sentence tries to convey. Answer is option (b).
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