You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Female snakes incubate eggs inside of their bodies, giving birth to live young of ____ or more. \Question: Choose the right answer from the options given a) five b) zero c) seven d) ten
Solution: d
Why? Snakes give birth to minimum ten young ones so ten is a correct answer.

New input: Some scales possess three or ____ ISOs.\Question: Choose the right answer from options given a) five b) seven c) four d) six
Solution:
c