The Owner of an Original Invention Who Has Not Yet

The owner of an original invention who has not yet applied for patent protection has demonstrated it to potential investors at two public meetings.Could the owner be denied a patent registration because of these demonstrations?

A) Yes.It is illegal to make any fundraising efforts of any kind before the patent has been granted.
B) Yes.An invention that has been publicised in any way may be denied registration.
C) No,provided the owner did this within the grace period that is allowed prior to the filing of a complete application.
D) No,provided the demonstration did not involve any commercial purpose,such as selling the invention to consumers.