Hich of the following increases internal validity?

Just trying to get some points : p sorry bro

No, you just need to see your messages  within 24hrs, our the msg is gone. and you need to screenshot it if it's important.

Metaprogramming  is a programming technique in which computer programs have the ability to treat programs as their data. it means that a program can be designed to read, generate, analyse or transform other programs, and even modify itself while running. ps: you don't have any options there.