“江山留胜迹，我辈复登临。水落鱼梁浅，天寒梦泽深。”是唐朝诗人孟浩然的作品。“人事有代谢，往来成古今”体现的哲理是[ ]

A、自然界是客观的

B、人类社会是客观的

C、事物的联系是普遍的

D、一切事物都是变化发展的

Originally introduced by Netscape Communications, (1) are a general mechanism which HTFP Server side applications, such as CGI (2) , can use to both store and retrieve information on the HTTP (3) side of the connection. Basically, Cookies can be used to compensate for the (4) nature of HTTP. The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based (5) .

A．programs

B．applications

C．frameworks

D．constraints