Select the conjunction that expresses a precautionary measure rather than a contractual condition:

The expedition leader distributed redundant satellite transmitters ________ the primary communications console experienced solar interference.

Answer and explanation

Correct answer: A. in case

Answer: in case. Why not the others: 'provided that' and 'as long as' introduce conditional stipulations (actions that occur only on condition that something happens), which does not match a precautionary distribution; 'unless' means 'except if', which would reverse the logical meaning.
  1. Step 1: Analyze the purpose of the action: the leader distributed transmitters as a precautionary safeguard against a potential future or concurrent risk.
  2. Step 2: Precautionary actions taken in anticipation of a possible event are introduced by the subordinating conjunction 'in case'.

Practise more Advanced Conditionals, Inverted Conditionals, and Modality.

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