Which of the following statements is NOT true about John McDermott

A．John McDermott was one of 15. men that entered the first Boston Athletic Association Marathon.

B．John McDermott was the first winner in the history of Boston Marathon.

C．An attendant rubbed John McDermott' s leg so as to get over the leg cramps.

D．John McDermott ranked 683rd in last year's Boston Marathon.

从口腔临床交叉感染的病原学考虑，最危险而又最典型的感染是

A．细菌感染

B．病毒感染

C．真菌感染

D．原虫感染

E．以上全都是