题目选项分析

Because many of Australia's marsupials, such as the koala, are cute and cuddly, as well as biologically different than North American marsupials, they have attracted a lot of attention aftertheir discovery in the 1700s.

Because many of Australia's marsupials, such as the koala, are cute and cuddly, as well as biologically different from North American marsupials, they have attracted a lot of attention sincetheir discovery in the 1700s.