The effect of fertilizing a fish pond with compost manure on phytoplankton population and fish yield is such that

• A.Phytoplankton population decreases as fish yield drecreases
• B.Phytoplankton population decreases while fish yield increases
• C.Phytoplankton population increases while fish yield drecreases
• D.Phytoplankton population increases as a fish yield increases