You are a test analyst and you need to prepare test data for a critical application. Select valid option with regard to test data preparation.

What is the correct answer $-$

a$.$ Normally it's easy to collect the realistic data

b$.$ None of the listed options

c$.$ Normally test data can be gathered from single system and database.

d$.$ Testers have perfect skills to deal with the various databases and schemas to extract test data

e$.$ Test data extraction is normally easy and not a time consuming process