Please Use the Following Information to Answer the Question(s)below

Multiple Choice

Please use the following information to answer the question(s) below.
The symbols +,-,and 0 are to be used to show the results of interactions between individuals and groups of individuals in the examples that follow.The symbol + denotes a positive interaction,- denotes a negative interaction,and 0 denotes an interaction that has no effect on the individuals involved.The first symbol refers to the first organism mentioned.
-What interactions exist between the cattle egret and grazing cattle?

A) 0/-
B) +/0
C) +/-
D) 0/0
E) -/-