The two correct answers that best support the inference that honeybees—not bumblebees—are responsible for infecting the studied flowers are:
- All the infected flowers researchers picked and tested were close to apiaries.
- All of the honeybees researchers collected were infected with both viruses.
Explanation:
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The first option indicates a correlation between the infected flowers and the locations near apiaries, which are typically associated with honeybee activity. This suggests that the flowers infected by viruses are likely influenced by the presence of honeybees nearby.
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The second option provides direct evidence that honeybees were infected with both viruses, indicating that they could be carriers of these viruses to the flowers, thereby implicating them in the infection of the studied flowers.
The other options primarily discuss the state of bumblebees and their proximity to apiaries, which does not directly support the inference about honeybees being responsible for the infection of the flowers.