Which sentence BEST explains the central idea of the text?
A
Although smartphones are helpful in
many ways, we should take a close
look at the downside of our
dependence on them.
B
Smartphones make highway
navigation easier, but they also
increase the danger caused by driver
inattention.
с
Smartphones are harmful when used
excessively by children, who are more
easily distracted and less disciplined
than adults.
Smartphones may have many
conveniences, but the reality is that
they are proving detrimental to our
social skills.