I'm at a loss between A & C but I'm not sure, I'd go with A
Viruses lack the properties of living things:
1. They have no energy metabolism
2. They do not grow
3. They do not respond to stimuli
4. They do not reproduce independently- they have to replicate by invading living cells.
Answer is B) decay at a constant rate
For your first question i think why are roses the best flowers
For your second question it is defeinitley what causes people to be clolor-blind