Which sentence uses punctuation​ correctly?

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.