Concept:The word opposite in meaning to the underlined word must express the reverse of “reckless” and also make sense in the gap.
Explanation:“Reckless” means acting without care, thought, or concern for danger or consequences.
“Cautious” means careful to avoid danger, harm, or mistakes.
Therefore, “cautious” is the direct opposite of “reckless.”
The other options, such as “responsible,” “reliable,” and “considerate,” do not primarily express the opposite idea of carelessness or lack of caution.
Since the sentence needs a word that is opposite in meaning to the underlined word and fits correctly in the gap, “cautious” is the best choice.
Answer:A. cautious