Questão de Inglês

Analyze the sentence: 'Unless you study harder, you will fail the exam.' Analyze the assertions below: I.'Unless' introduces a conditional subordinate clause meaning 'If... not'. II.The main clause expresses a future consequence dependent on the condition. III.The sentence can be paraphrased as 'If you don't study harder, you will fail the exam' with identical meaning. Mark the option that presents only the correct statements.