Hi. What's wrong with answer C? Which library name (libref) is valid? a. 2010Car b. car/2010 c. car2010 d. cars_2010 Your answer: d Correct answer: c This libref follows all three rules for valid librefs. A libref must have a length of one to eight characters, and must begin with a letter or underscore. The remaining characters must be letters, numbers, or underscores.
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