Discussion

Explanation:

The president was not prowling the corridors as there is no mention of the president wanting to catch hold of someone (no predatory instinct that is). A stroll is a leisurely walk and in his angry mood, the president cannot be taking a leisurely walk! ‘Stormed’ will not fit where usage is concerned. A person may storm in or out of a corridor. Paced is the correct word. Pace is a manner of walking in which a person may stride or walk back and forth.
Hence, the correct answer is option 1.

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