Consider downloading a web page with 5 referenced objects inside it. Ignore DNS resolution times. Z is the round trip time from client to the web server. Thus, it takes time Z to set up a TCP connection. It takes an additional time Z to send a request for the object and to get back the object. What will be the total time to download the web page with the referenced items under:

(A) Non-persistent http with no parallel connections

(B) Non-persistent http with up to 5 parallel connections

(C) Persistent http where request for all objects can be issued at once.

(D) Persistent http where the referenced objects are on another server.