What is the best programme for building muscle and a six pack?

what do you think is best, for one that i can do at home that builds muscle and a six pack? I was looking at insanity and p90x but been told none of them are good for building muscle.

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).