Answer:
c) repeat the cell cycle continuously
Explanation:
Cell division is a normal phenomenon for all cells as this is the way the cell reproduces and gets repaired in living organisms. However, some cells, due to mutation, keeps dividing and proliferating to form tumours. These cells are called CANCER cells. A normal cell undergoes cellular repair at certain checkpoints of the cell cycle. The checkpoints are necessary to determine a faulty cell and stop its division. 
However, cancerous cells do not undergo any repair, which is why they do not enter the G0 phase as mentioned in the question. They keep on dividing out of control without death by repeating the cell cycle continuously.
 
        
             
        
        
        
Unfortunately no, my friend is not correct. The CO2 pollutants leaving his exhaust are warm, yes, but that is why our atmosphere is creating global warming which is affecting climate in all regions. When there is more people that means more cars and more pollutants being dispersed into our atmosphere.
 
        
             
        
        
        
The answer would be a panic attack.
The panic attack causes the person activates the sympathetic system that them sweating and breathing fast. 
Rapid breathing will cause many CO2 removed than normal, lead to lower level of CO2 in the blood. Carbon dioxide makes the blood more acid, so lower level of CO2 will make the blood become basic, cause respiratory alkalosis which causes the numbness in feet and hands.
        
             
        
        
        
Both genetic engineering and artificial selection allow humans to change a species so that its members are better suited for human needs.
        
             
        
        
        
It could possibly give you immunity from the disease.