$ 𝐼(𝑥)=$“$𝑥$ has an internet connection”
$𝐶(𝑥,𝑦)=$ “$𝑥$ and $𝑦$ have chatted over the Internet”
$Domain(x,y)=$ $\{𝑥$ and $𝑦$ consists of all students in your class.$\}$
“Everyone in your class with an Internet connection has chatted over the Internet with at least one other student in your class.”
can be reinterpreted as:
“For every student in your class, if they have an internet connection, then there exists at least one other student with an internet connection, with whom they have chatted.”
$=\forall x[I(x) \rightarrow \exists y(I(y) \land C(x,y))]$
Option (2.) is indeed the answer.