Answer:
c. I will be late for school.
Step-by-step explanation:
So we know that your alarm clock did not go off, leading to the result of the bus arriving one hour ago without you knowing, we need to find the most reasonable spot for what could happen next.
A. states that you will have to get a ride to the concert - This is wrong because the situation never mentions a concert, though it could be possible, this is not reasonable due to lack of information about the said concert.
B. states that you will miss the bus - This is incorrect because you have already missed the bus, therefore this action has already happened and is in the past.
C. states that you will be late for school - This is correct because it is the most reasonable event to happen, usually kids get to school by bus, it would make sense for you to be late to school if you don't reach the bus in time.
D. states none of the above - This is obviously incorrect, we have found c already.