Which is a compound sentence?

 - The thermometer and the cough syrup are in the medicine cabinet next to the cotton balls.
 - Amelia can eat the leftover tomato soup, or she can make herself a tuna sandwich.
The second sentence is the compound sentence. It is made up of two independent clauses joined by the coordinating conjunction or.
Amelia can eat the leftover tomato soup, or she can make herself a tuna sandwich.