Will the White Powder and Scales Be Admissible Under the Plain

Will the white powder and scales be admissible under the Plain View Doctrine

A) Yes, Officer Thompson was legally in the restaurant.
B) Yes, Officer Thompson inadvertently observed them.
C) No, Officer Thompson did not have probable cause to seize them because the white powder and scales are commonly used in restaurant kitchens.
D) No, Officer Thompson entered the restaurant without a search warrant.