After Reading the Paragraphs Below, Answer the Question(s) That Follow(s)

Multiple Choice

After reading the paragraphs below, answer the question(s) that follow(s) .
Introduced species are a problem all over the world, and there are many examples in the United States. Several years ago, a fisherman caught a northern snakehead fish in a pond in Crofton, Maryland (a suburb of Washington, DC) . Snakeheads are a favourite food of immigrants from China, and live fish can frequently be found in Asian markets. It's suspected that the fish in the Crofton pond were purchased locally and then intentionally released.
Snakeheads are top predators, and 90% of the northern snakeheads' diet consists of other fishes. The northern snakehead can breathe out of water and travel short distances (about 30 metres) across land. They also breed rapidly. Females can lay more than 100 000 eggs per year. Juveniles have also been identified in the Potomac River and other rivers in Pennsylvania.
-In general, introduced species can be catastrophic for ecosystems because they

A) disrupt the balance of interspecies interactions that have typically evolved over long periods of time.
B) become the keystone species in any ecosystem.
C) invariably become the top predator in an ecosystem.
D) compete for resources with the top predator in an ecosystem.