Answer:
d
Explanation:
Note that 
> means greater than 
< means less than 
for example : 2 < 3 means 2 is less than 3
3 >2 means 3 is greater than 2
To determine which comparison is better we have to convert litre to millimetre
1 litre = 1000mm
A 5 mm > (50 x 1000) 
5 mm > 50,000
5 is not greater than 50,000
B. (2 x 1000) < 200 mm 
2000 < 200
2000 is not less than 200 
C. (100 x 1000) < 1,000
100,000 < 1000
100,000 is not less than 1000
D. 3200 > (3 X 1000) 
3200 > 3000
3200 is greater than 3000