When Do Registration Statements Usually Become Effective

When do registration statements usually become effective?

A) twenty business days after they are filed, unless the Securities and Exchange Commission requires additional information to be disclosed
B) thirty business days after they are filed, unless the Securities and Exchange Commission requires additional information to be disclosed
C) thirty-five calendar days after they are filed, unless the Securities and Exchange Commission requires additional information to be disclosed
D) sixty business days after they are filed, unless the Securities and Exchange Commission requires additional information to be disclosed
E) ten calendar days after they are filed, unless the Securities and Exchange Commission requires additional information to be disclosed