The Eurasian ruffe, a fish species inadvertently introduced into North America’s Great Lakes in recent years,
feeds on the eggs of lake whitefish, a native species, thus threatening the lakes’ natural ecosystem. To help
track the ruffe’s spread, government agencies have produced wallet-sized cards about the ruffe. The cards
contain pictures of the ruffe and explain the danger they pose; the cards also request anglers to report any ruffe
Which of the following, if true, would provide most support for the prediction that the agencies’ action will have
its intended effect?
(A) The ruffe has spiny fins that make it unattractive as prey. --neutral.
(B) Ruffe generally feed at night, but most recreational fi shing on the Great Lakes is done during daytime hours.-- weakens.
(C) Most people who fi sh recreationally on the Great Lakes are interested in the preservation of the lake
whitefi sh because it is a highly prized game fish. -- IMO
(D) The ruffe is one of several nonnative species in the Great Lakes whose existence threatens the survival of
lake whitefish populations there. --neutral.
(E) The bait that most people use when fi shing for whitefi sh on the Great Lakes is not attractive to ruffe. -- weakens.