Answer:
The logical appeal FOR increasing the time of the school day for more standardized test preparation is Only by extending the school day, can we allow for test preparation and not "steal time" from other "non-essential" classes.
Step-by-step explanation:
The sentence that supports the idea that will make people agree with the idea of increasing the time in school is emphasizing how all the time dedicated to education is valuable and how at the end it will represent a benefit for the students and provide a better preparation, while the other options are talking about budget and the academic obligations of the schools and administrators.