them or which?

[aous02]

The choice of the English equivalents should be based on a number of criteria. The most important of which/them is what we may call « usage ».
Which one would you rather opt for?

 

[corum]

The choice of the English equivalents should be based on a number of criteria, of which the most important is what we may call usage.

or

The choice of the English equivalents should be based on a number of criteria, the most important of which is what we may call usage.

or

The choice of the English equivalents should be based on a number of criteria. The most important of them is what we may call usage.

 

[Barb_D]

I completely agree.