F. None of the above.

The main results were as follows: "In thesurvey of e-cig users, dependence on e-cigs was significantly lower than it hadbeen on cigarettes (8.6 v 14.9). ... Currente-cig users are significantly less dependent on e-cigs than they were oncigarettes prior to switching."

One possible answer appears in Wride's column. She writes:

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