From the options listed the strategy that would be least useful for helping students monitor comprehension of a text as they are reading is (A) breaking long sentences into short phrases
This option does not seem the most effective since it is a simplification or summary of sentences and the simplification does not always imply apprehension nor a correct hierarchization of the text.
He definitely wasn't all there, if you know what I mean
S V IO PA PN/DO
My father gave me a new football.
Football acts as both a predicate noun and a direct object in this sentence.