Please choose the correct solution to the question: To make a newspaper tube,

Solution1: lay a rectangle of newspaper on a work surface, dot caramel on the surface of the paper, and carefully roll the paper up into itself from one end.

Solution2: lay a rectangle of newspaper on a work surface, dot glue on the surface of the paper, and carefully roll the paper up into itself from one end.

Answer format: solution1/solution2
Answer: solution2