That's displayed as the correct answer above. What part of the sentence was marked as incorrect?
Where I typed newspaper, I got as a correction "They were reading the same papers"
«Lo» replaces «il» when the next word starts…
- With X or Z.
- With Y, J or semivowel i (the three letters are pronounced as Y in English).
- With S complicata (that is, "S+consonant").
- With double consonant, always as long as the second consonant is not R or L (except when the first consonant is S).
- With «ch» and the word comes from French. «Ch» in words taken from French are pronounced as «sh».
The plura form of «lo» is «gli».
«Uno» replaces «un» in the same cases.
«Gli» is also used along with «dèi» ("gods").
Because the article changes for euphony with the word immediately following. So it's "il giornale stesso" (note: that would be bad grammar, but this is just for an example), but it's "lo stesso giornale". Same thing would happen if you were going to so "il vecchio zio" vs. "lo zio vecchio".
Always two. You'll start to instinctively figure out when to double up on "c", "g", "l", and "z", but there's no real flexibility there. Dropping or adding a letter can change the entire meaning of the word.