Which of the following regarding looking up words in a dictionary is  true?                 a.  print dictionaries generally contain audio attachments.      b.  if a word has two definitions listed, you need only pay attention to the first one.      c.  print dictionaries rarely offer synonyms, whereas online dictionaries do.      d.  if a word has two pronunciations listed, the first one is considered the more common.

When using the dictionary, multiple definitions is something that you need to pay great attention to. The definition of the word is mainly based on its usage in the sentence you have. However, when writing definitions in the dictionary, the most common definition is usually listed first. This also applies to the pronunciation of the word.

Based on this, the correct choice would be:
D. If a word has two pronunciations listed, the first one is considered the more common.