You are the project lead of a large application development project to implement an e$-$commerce portal for your customer. You are now at the end of system testing and would like to understand how robust the initial requirements phase of the project was. Which of the following would be the dest metric for this?

Select one:

a$.$ Number of initial requirements at end of requirements phase$/$total number of requirements currently

b$.$ Requirements Stability Index

c$.$ Number of defects by origin phase

d$.$ None of the other answers is correct