Almost every modern kitchen today is equipped with a microwave oven, mainly because microwave ovens offer a fast and convenient way of cooking and reheating food. Indeed, it has become a standard appliance in most households. Studies have shown, however, that microwave ovens are not completely safe and their use has occasionally resulted in serious injury. Because of this, some consumer advocates argue that microwave ovens should not be so readily accepted as a standard appliance until they can be certified to be completely safe.

Which of the following, if true, would most strengthen the argument of the consumer advocates?
A. Microwave ovens have taken much of the joy out of cooking.
B. There have been many reported incidences of people who have been scalded by liquids superheated in microwave ovens.
C. Absolute safety is the only criterion by which an appliance should be judged to be acceptable as “standard.”
D. There is no such thing as a completely safe appliance.
E. Stoves and ovens that use natural gas consume energy much more efficiently than microwave ovens

OA C
IMO B

Conclusion: Microwave should not be accepted as standard until certified as safe.
Evidence: findings of studies.

I chose B because B was supporting the findings shown by the studies although narrowly.
C exposes the assumption of the argument.

which is the best way to strengthen the argument?