Pre-qualification of suppliers is used to determine if the suppliers meet the basic requirements of...

Explanation

The correct answer is financial stability (this is done by using all of those lovely ratios in chapter 1.3) and capacity and capability (which are part of Carter's 10 Cs).

At PQQ stage you're looking purely at whether the supplier is good or bad (to put it simply). You don't give them details of your requirement yet, so they're not providing a quote / pricing structure / price schedule at this point in time. That would be at the next stage, IF they pass PQQ, when you issue the tender competition.