In the given sentence, "The candidate felt that his academic credentials were sufficient to win him the job," the term "academic" refers to education-related qualifications or achievements. To maintain the original meaning of the sentence, the word or phrase replacing "academic" should convey a similar sense related to education or schooling.
Among the given options:
- important: This refers to being of great significance or value, which does not specifically relate to education.
- educational: This directly pertains to education, schooling, or learning, aligning closely with the meaning of "academic."
- costly: This refers to being expensive or high in price, unrelated to education.
- experience: This refers to practical involvement or exposure, distinct from formal education or academics.
Thus, the word "educational" best preserves the meaning of the original sentence when substituted for "academic."