The bridge enables people to get to the island in less than an hour. The underlined part means "_      "   [ ]

A. makes it safe for  

B. makes it possible for  

C. makes it necessary for  

D. makes it enjoyable for

通用会计核算软件比专业会计核算软件（　）。

A．通用性强，开发水平高

B．维护量小，购置成本高

C．成本高，开发水平高

D．通用性差，维护量大