My understanding is that when you meet with the prosecutor you will likely be offered a plea bargain. As a G2 driver, any conviction, including agreed to pleas, resulting in 4 or more demerits, means your licenses is suspended for 30 days under the escultating sanctions rules (http://www.mto.gov.on.ca/english/dandv/ ... .8.1.shtml). Keep in mind insurance companies usually ask about convictions, accidents and suspensions.
To defend against the charge in court you may want to think about seeking legal assistance, as the details matter. It is not enough to say that you hit a car and thus you are guilty of careless driving, and it is not enough to say, it was foggy with low light conditions, I didn't see the car and thus I am not guilty.