A Bacterium Has the Following Characteristics

A bacterium has the following characteristics:
∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration
∙ It can survive being boiled
∙ It contains no plasmids and relatively little peptidoglycan
Which of the following characteristics allows this bacterium to adhere to the intestinal lining?

A) fimbriae
B) pili
C) an endospore
D) a flagellum