A ________ investigation can sometimes yield new facts, but typically organized ones are more successful.
The word that best fills the blank in the above sentence is
Meandering: If a text, process, or activity meanders, it has no clear purpose or direction
The correct word is meandering. It means 'proceeding in a convoluted or undirected fashion.'
All other options are similar to the word organized.
The use of phrase but in the question implies the answer must be the word that contradicts the meaning of organized (ordered).
Timely, Consistent and Systematic implies same behavior as organized.
Hence the answer has to be meandering (ANS)
Meandering :an act of following a winding course