Refer to the Table

Refer to the table.
A research team is examining competitive outcomes between two species of diatoms, A and B. The team has manipulated levels of silica and phosphorus and examined whether species A won the competition, species B won the competition, or whether there was co-existence between the two species (C) . The results are shown in the table. From these results the team concluded that

A) species A always outcompeted species B at high phosphorus levels.
B) species A always outcompeted species B at low phosphorus levels.
C) species A always outcompeted species B at low silica levels.
D) species A always outcompeted species B when the ratio of silica to phosphorus was high.