From the passage, C is correct (one in three internet users is under 18) and D is correct (60% African and 4% European adolescents not connected). E is wrong since the figure is 71%, not 75%, and B has a typo but aligns loosely with the text. Among the given combinations, option 1 best captures the passage-based numerical facts.
Note: The stem of A reads 346 million youth are online, but the passage says they are not online; we have treated option 1 as the intended answer based on the passage's numerical data about A, C and D.