Evaluating how current, credible, and unbiased a source is ensures: your information is more accurate and useful you information is wrong you need a new book all the above

All the attributes above are important for a source. If the source is current, your information is probably more useful and if the source is credible and unbiased, it is more accurate. The 2nd choice does not make sense since evaluating your source is positive and only sometimes yields that your information is wrong. Finally, in order to evaluate your source, you do not need a book, there are other means like journals or diaries etc. Hence, the first choice is correct.