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Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) · Cisco
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The answer is C. If you plot the characters in regex101.com it is expressed correctly on the right under explanation.
The answer is C. colou?r.
The correct answer is A. colo?ur. The regular expression "colo?ur" matches both "color" and "colour." Here's the breakdown of the regular expression: "col" matches the characters "col" literally. "o?" makes the "o" character optional. It matches zero or one occurrence of the preceding character, which in this case is "o." "ur" matches the characters "ur" literally.