Using a Series of Arrows, Draw the Branched Metabolic Reaction

Using a series of arrows, draw the branched metabolic reaction pathway described by the following statements, then answer the question at the end.
∙ L can form either M or N.
∙ M can form O.
∙ O can form either P or R.
∙ P can form Q.
∙ R can form S.
∙ O inhibits the reaction of L to form M.
∙ Q inhibits the reaction of O to form P.
∙ S inhibits the reaction of O to form R.
Which reaction would prevail if both Q and S were present in the cell in high concentrations?

A) L → M
B) M → O
C) L → N
D) O → P
E) R → S