In which sentence， you cannot find a synonym（同义词） of the word in red？

In which sentence， you cannot find a synonym（同义词） of the word in red？
A.There is a；drawback， a disadvantage， to that idea.
B.Taking the time to prepare for a test is a sensible，prudent；decision.
C.During a drought， plants that are；indigenous；to the area typically do better than non-native plants.
D.Although I prefer the calmer rides at amusement parks， the rest of my family loves the；formidable；ones.
正确答案：Although I prefer the calmer rides at amusement parks， the rest of my family loves the；formidable；ones.