what is the meaning of the word casually in this paragraph?
in a shy and quiet way
in a loud and showy way
chris wanted to sit next to the stars of his
school's baseball team, but he wanted to
treat them like his other friends. as he
passed their table, he acted cool and
casually acknowledged their presence.
chris' natural behavior won him the
friendship of the baseball team. they
always looked forward to hanging out with
kids like chris, who didn't treat them any
differently than the rest of the students.
in a serious and formal way
in an informal or natural way

One of the author’s purposes in the code book is to explain different types of codebreaking to his readers. which line best demonstrates this purpose? a theoretical breakthrough would be a fundamentally new way of finding alice's private key mathematicians have been studying factoring for centuries, and modern factoring techniques are not significantly better than ancient techniques a more recent development is the so-called tempest attack, which aims to detect the electromagnetic signals emitted . . in a computer's display unit if scientists could build a quantum computer, it would be able to perform calculations with . . enormous speed