Please help me answer this question Based on the no argument what dangers would astronauts face on Mars

Austonoughts would face lots of danger  like shortage of food and not being able to get backup. The article states that if something were to go wrong the backup would be too far away to be sent. If there were something to go wrong that would leave the autronought with low chances of life. In addition to this the autronought would also have to worry about the deadly rays of the sun. If he or she were to be exposed to much the radiation could affect them and probably be deadly due to the amount of radiation on mars. Since the atmosphere on mars is thinner than the one on earth it would not protect the austronought. Not only this but there are also toxic soil problems, low gravity, the isolation that accompanies Mars' distance from Earth, a lack of water, and cold temperatures.

i would have to say "a" or "d".