Its definitely not A or D because there are 26 weeks in 6 months.
generally, a weight loss of 1-2 lbs per week is reasonable and safe.
I would say B because it is unrealistic that someone would always lose 2lbs a week
Good job for getting the answer
You would most likely find it in the plants stem.
Drinking water shortages? Water across the world isn't purified which without purification doesn't quench thirst.