Rust is caused when there is a redox reaction of iron and oxygen in the existence of water or air moisture. For the metal to be weakened by rust, the oxygen atoms needs to be mixed with metallic atoms to form the oxygen compound.
C and D are likely correct.
High interest rates would likely dissuade people from using credit cards and would likely move them back to using their debit cards for purchases and to keep credit card purchases to ones that they knew they could pay back. You would end up getting people who were more desperate for the line of credit using it.
They had little food, and their husbands, or wifes, or kids to depend on so that they have something to fight for.
Answer: synaptic receptors
Explanation: