Select all that apply.

• A

  Each procedure can be a nested subprogram.

• B

  Each procedure's formal parameters can differ in data type or name.

• C

  Each procedure must use named notation to specify the corresponding actual parameters.

• D

  Each procedure's formal parameters must differ in name.

• E

  Each procedure can be a packaged subprogram.

• F

  Each procedure must use positional notation to specify the corresponding actual parameters.

• G

  Each procedure can be a standalone subprogram.