[texhax] xcolor package puzzle

[Schneider, Thomas (NIH/NCI) [E]]

 Herbert:

> \PassOptionsToPackage{table}{xcolor}
> \documentclass{pnas-new}
>     
> or simply
>     
> \documentclass[table]{pnas-new}

Oh my gosh so simple!  Both work perfectly!  Thanks!

How does the latter avoid being ambiguous as to which package it
applies?  (I'll use the former.)

Tom

  Thomas D. Schneider, Ph.D.
  Senior Investigator
  National Institutes of Health
  National Cancer Institute
  Center for Cancer Research
  RNA Biology Laboratory
  Biological Information Theory Group
  Frederick, Maryland  21702-1201
  schneidt at mail.nih.gov
  https://alum.mit.edu/www/toms