Question: The first piece of advice given in the Aphid control section is "assess virus risk". This is important because: Need Assignment Help? Select one: a. There may be a virus on the aphids which will kill the aphids anyway. b. You need to make sure you don't kill viruses when spraying the aphids. c. Aphids are known carriers of viruses which cause plant disease. d. The presence of viruses enhances oil production in canola.