Questões de Concurso Público Prefeitura de São Leopoldo - RS 2016 para Professor de Inglês

Read the following sentences about the text:
I. The understandings of literacy are different than they used to be. II. Young children are used to technology and this knowledge has an impact on the learning process. III. Half of kindergarten children use the internet regularly to interact with family and friends.
Which ones are correct?

According to the text,

The pronoun “them” (line 13) refers to: