Which of the following queries contains an equality join? (refer to the tables in the JustLee Books database.)a. SELECT title, authoridFROM books, bookauthorWHERE books.isbn ¼ bookauthor.isbnAND retail > 20;b. SELECT title, nameFROM books CROSS JOIN publisher;c. SELECT title, giftFROM books, promotionWHERE retail >¼ minretailAND retail <¼ maxretail;d. none of the above

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A:

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