Given Information:
the store sold items over two consecutive days
each items was shipped on the day it was sold
all clearance items were shipped with standard shipping
all items shipped with rush shipping were non clearance
Now lets evaluate each statement
(1) Standard shipping was the only method of shipping used for items purchased on the first day.
This tells us that no rush shipping was used on the first day
However, it doesn't tell us anything specific about cory's purchase
This statement alone is not sufficient to determine when cory made his purchase
(2) The item Cory purchased was a clearance item.
We know that all clearance items were shipped with standard shipping
However, this doesn't tell us which day cory made his purchase
This statement alone is not sufficient to determine when cory made his purchase
Noe lets consider both statements together
From(1), we know that only standard shipping was used on the first day.
From (2), we know that cory bought a clearance items which must have been shipped with standard shipping
Since all clearance items were shipped with standard shipping and only standard shipping was used on the first day cory must have purchased his item on the first day
Therefore the correct answer is C : Statement 1 and 2 together are sufficient to answer