GMAT Sentence Correction (SC) | Re: Today, despite widely available technology such as high-resolution

The correct comparison should be drawn between the following elements:

1. Counterfitting is difficult today.
2. It was difficult at the time of the Civil War.

Thus the correct structure is:
Counterfitting is MORE difficult today THAN it was (difficult) at the time of the Civil War.

In option C, the critical parts, "today" and "it was", are missing.

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