Which two U.S. states have shorelines on Lake Ontario?

The correct choice highlights that New York and Pennsylvania are the two U.S. states with shorelines along Lake Ontario. Lake Ontario is situated to the north of New York State, which has an extensive shoreline along the lake. Pennsylvania has a smaller section of shoreline at its northwestern corner, contributing to direct access to Lake Ontario.

New York’s shoreline is significant, as it contains many recreational and commercial areas along the lake. Though Pennsylvania's contribution is minimal compared to New York's, it is still part of the shoreline. Other states mentioned, such as Ohio, Michigan, and New Jersey, do not have shorelines on Lake Ontario, as their geographical locations either do not border the lake or are situated at a distance that does not allow for direct access.