Can the child of a mixed marriage outside the Church go to heaven?

The Catholic Answers

If the child is brought up as a Protestant it has the same chance as any Protestant in similar circumstances from other points of view. If brought up as a Catholic, it has the additional helfs of the Catholic religion just as any other Catholic child, except that it has the bad example of a non-Catholic parent ignoring obligations which the child is taught to be essential, and the weak faith in many cases of a Catholic who thinks so little of her religion as to marry outside the Church.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty