I have asked this question all are wrong so its better to skip if you solve it you will get downvotes for sure

Which of the following is an example of a non$-$functional requirement?

a$.$

The system must process $100$ transactions per second

b$.$

The system must allow users to search for products by category

c$.$

The system must be compatible with Internet Explorer $11$

d$.$

The system must generate a report within $5$ seconds of user request