Due to a lack of archaeological evidence, it is not clear where the Chihuahua originated. Although the dog is named after Chihuahua, Mexico, ironically the largest state in the country, this tiny breed of dog is actually thought to have originated in China, where the practice of miniaturizing plants and animals was common. It is believed, but not confirmed, that Spanish settlers brought the breed to Mexico, where it flourished in the favorable warm weather. 1. Which of the following best summarizes the above passage about the origin of the Chihuahua?

Penicillin, still the most commonly prescribed antibiotic, is often regarded as a “modern miracle.” However, its use actually dates back to ancient times. The ancient Egyptians combined moldy breadcrumbs and hippo fat to create a mixture used to disinfect wounds. Although they were not able to identify which molds fought infection or why, they successfully used them to treat infection. More likely than not, one of these molds was what we now call “penicillin.” 2. Which of the following is the best summary of the above passage about penicillin?

Despite the fact that we have been fortunate enough to find cures for many life-threatening diseases, there is still no cure for the pesky common cold. Our only defense is prevention. We must learn how to avoid getting sick in the first place. The most effective way to reduce your chances of contracting a cold is to wash your hands regularly, eat nourishing foods, and exercise. 3. The best summary for the above passage about the common cold is