In the Section "Investigating Life: the Hidden Cost of Traps",a

In the section "Investigating Life: The Hidden Cost of Traps",a normal pitcher has a narrow keel and a wide pitcher opening,maximizing the potential for trapping prey.On the other hand,a leaf optimized for photosynthesis has a wide keel and a small pitcher opening.Based on this observation and the figure,what conclusion can be drawn?

A) High phosphorus correlated with increased photosynthetic ability.
B) High nitrogen correlated with increased photosynthetic ability.
C) High nitrogen correlated with increased trapping ability.
D) High phosphorus correlated with increased trapping ability.