A.
Lisa tried everything to find her lost cat: she posted signs around campus, sent out hundreds of e-mails, and offered a reward.
B.
Lisa tried everything to find her lost cat, she posted signs around campus, sent out hundreds of e-mails, and offered a reward.
C.
Lisa tried everything to find her lost cat she posted signs around campus, sent out hundreds of e-mails, and offered a reward.
D.
Lisa tried everything to find her lost cat. she posted signs around campus; sent out hundreds of e-mails, and offered a reward
