What Does "Regulation A" Under the Securities Act of 1933

What does "Regulation A" under the Securities Act of 1933 provide?

A) exemption from registration for certain types of securities
B) exemption from registration for certain securities transactions
C) a simplified registration process for up to $5 million of securities sold to the public during a twelve-month period
D) state regulation in place of federal regulation for certain small offerings
E) that "tombstone ads" can be placed during the waiting period