In a coffee shop, the following coffee samples are prepared for customers.

i. 10 g of sugar added to 100 g of coffee
ii. 10 g of sugar added to 200 g of coffee
iii. 4 g of sugar added to 200 g of coffee
iv. 4 g of sugar added to 100 g of coffee

Based on the amount of sugar added, which sequence ranks the coffee from the sweetest coffee to the least-sweet coffee?

a. i, ii , iii, iv
b. iii, iv, ii, i
c. iv, i, ii, iii
d. i, ii, iv, iii