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Bedbug infestations have been a problem in major cities for years. The pesticide DDT has been found to be useful in killing bedbugs. However, DDT was banned in the United States and has been replaced by weaker pesticides. Thus, there is no effective means for eradicating bedbugs in the United States.
Which of the following, if true, most weakens the conclusion?
(A) Bedbugs resemble other small insects in their appearance and behavior.
(B) Bedbugs have largely been eradicated in other parts of the world.
(C) Some treatments that do not include DDT have proven effective against bedbugs in other parts of the world.
(D) Bedbugs are resistant to the types of pesticides used to treat cockroach and ant infestations.
(E) The number of bedbug infestations has risen significantly in the 21st century.
OA C
Source: Manhattan Prep
Which of the following, if true, most weakens the conclusion?
(A) Bedbugs resemble other small insects in their appearance and behavior.
(B) Bedbugs have largely been eradicated in other parts of the world.
(C) Some treatments that do not include DDT have proven effective against bedbugs in other parts of the world.
(D) Bedbugs are resistant to the types of pesticides used to treat cockroach and ant infestations.
(E) The number of bedbug infestations has risen significantly in the 21st century.
OA C
Source: Manhattan Prep
