Currently the only predators of Galápagos marine iguanas are Galápagos hawks. Iguana body size is ...

Currently the only predators of Galápagos marine iguanas are Galápagos hawks. Iguana body size is not correlated with risk of hawk predation, although small iguanas can sprint faster than large iguanas. If predators (e.g., cats) that preferably catch and eat slower iguanas are introduced to the island, iguana body size is likely to ________ in the absence of other factors; the iguanas would then be under ________ selection.
A) increase; directional
B) increase; disruptive
C) decrease; directional
D) decrease; stabilizing
E) stay the same; stabilizing