Components A,B,and C Are Connected in Series

Multiple Choice

Components A,B,and C are connected in series.Component D is connected in parallel to component B.Which of the following statements is true?

A) The system works only if A works,B or C works,and D works.
B) Component B must work for the system to work.
C) The system works when A works,C,works,and either B or D works.
D) Components B and C are backups to A.
E) The system works if D works,and any of A,B,or C works.