伞蜥分布在新几内亚南部的干燥草原、灌木丛及树林等地区中，在受到威胁时，伞蜥会突然张开颈圈，这一行为属于（ ）
A：防御行为
B：攻击行为
C：繁殖行为
D：节律行为
① How much is it? ____ A. OK. Here you are.
② Can I try them on? ____ B. It's $89.
③ Is it too expensive? ____ C. It's very pretty.
④ How do you like this skirt? ____ D. Yes，it is.
