I NEED HELP ASAP!! which of the following caused the greatest threat to the first Georgia colonist who arrived?

A. The humid climate attracted mosquitoes, leading to widespread disease.
B. The soil was not good for farming the crops that they brought with them.
C. The Spanish and French kept attacking the British settlements along the Georgia coast.
D. The Natives Americans were unhappy with the large number of colonist moving into Georgia and began attacking the colonist.