Let's match the items based on their values and relationships:
-
21
- Best Match: a. 125/729
(Since 125/729 is approximately 0.171, which doesn't match any number close to 21, so this might be a mistake but as per your choices, we'll note it.)
- Best Match: a. 125/729
-
1/9
- Best Match: d. 1/729
(Since 1/9 is equal to 0.111 and 1/729 is significantly smaller, this seems incorrect but it's the only connection left.)
- Best Match: d. 1/729
-
0.89
- Best Match: b. 0.704969
(0.89 is higher than 0.704969 but it's the closest option we have.)
- Best Match: b. 0.704969
-
5/9
- Best Match: a. 125/729
(Again, this appears wrong in partial lines but that is the structured choice available. However, in clarity, 125/729 ≈ 0.171 and 5/9 ≈ 0.555 which doesn't equate in logical flow.)
- Best Match: a. 125/729
So the final matches based on appropriate clarity would most probably show as:
- a
- d
- b
- a
Verifying accuracy in proper mathematics could realign this to be otherwise coherent.