GMAT Sentence Correction (SC) | Re: In 1852 Robert Angus Smith published a detailed

Hi mikemcgarry[/url],

I rejected option B because I thought that a comma is must (as you also used a comma in your explanation)...
Can such structures be rendered correct without the use of comma ...

For e.g. :
the more I practice SC, the better I feel about it...

If you see, we by default use a comma all such structures ....

Can please throw some light on this ...