All of the following factors can cause famines except А
the failure of food production to keep pace with population growth
B.
distribution problems caused by political turmoil
С
new, higher-yield crops
D
crop failure brought on by sustained drought

C: new, higher-yield crops

Explanation:

All of the other answers are problems while C is a positive scenario.

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!