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.