2008年4月1日，《中华人民共和国食品卫生安全法》草案正式公布。该草案向社会公开征求意见，问计于民。草案公布后，公民通过网络、电话、写信等多种方式向有关部门反映意见和建议，这是公民通过重大事项社会公示制度参与 的体现。

在△ABC中，B（﹣3，0），C（3，0），直线AB，AC的斜率之积 $\frac{4}{9}$ ，求顶点A的轨迹．

根据短文内容，选择正确答案。
A
    One day, Mr. and Mrs. White went shopping by car. They stopped their car near a store. They bought a lot of things and they wanted to put them in their car. But Mr. White couldn't open the door of the car. “Let's ask a policeman for help.” said Mrs. White. They asked a policeman to help them. The policeman was very friendly to help them open the door of the car. Just then a man came up and shouted, “What are you doing with my car?” Mr. and Mrs. White took a look at the number of the car. It was not their car.

读右面某时期世界贸易图，从中可以看出（        ）

计算：（ $\frac{1}{3}$ ）⁰+（﹣1）²⁰¹⁶﹣|﹣ $\sqrt{3}$ |+2sin60°．