A. make all of the own properties of that object non configurable
B. to configure and bring a writable property
C. “lock down” objects into a known state and prevent outside tampering
D. to include new properties into the object

Solution

C. “lock down” objects into a known state and prevent outside tampering

Explanation

Extensible attributes determines whether the object can have new properties or not. Therefore extensible attribute will allow an object to include and write properties into them.