Select the letter of the correct answer.

D - Technology has changed over the years, but parents still worry about it.

The answer is D because in both of the light pink boxes, it says that the parents are concerned about it, and in the first pink box it talks about the radio and then in the next box it talks about video games, TV, and the internet, which is showing that technology has improved over time.

A and B are wrong because neither of the two pink boxes talk about the year(s) it took place, so the main idea isn't based of of those two. C is wrong because neither of the two pink boxes talk about the dangers of being online. But D is the only option that is included in both boxes, so D is correct.

thymine. in rna, thymine is replace by uracil

d.

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