The gray tones reinforce the mood of impending doom that will come if factory workers are not dedicated.
<h3>What is sentence structure?</h3>
Sentence and clause structure are referred to the sentence composition.
In grammar, there is a proper structure for making a sentence.
There are simple, compound, and complex sentences.
Every sentence has a dependent and independent clause.
Thus, the correct option is C, The gray tones intensify the sense of impending catastrophe that will befall manufacturing workers if they are not committed.
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