Answer:
A. If students spend less than 1 hour per night studying math they will get a grade of 75% or lower.
Step-by-step explanation:
A conclusion (or hypothesis) is a prediction or an educated guess of the outcome of an experiment. A hypothesis is done before performing an experiment and tries to state what the observer thinks will happen. A hypothesis must be defined as to exactly what will happen and statement 1 is the only one that fits this requirement.