Which of the following statements about mobile websites is not true?

Question $5$ options:

A$)$

Mobile websites can be built using standard web tools such as server$-$side HTML$,$ Linux, PHP and SQL$.$

B$)$

Generally, mobile websites operate more quickly than traditional websites viewed on a desktop computer connected to a broadband office network.

C$)$

Mobile websites run on a firm's servers, just like a traditional website.

D$)$

Most large firms today have mobile websites.