Each brand is trying to find a way to get a leg up on the competition in a tight market space. The above picture is what I found on my last grocery run. What caught my eye was the asterisk next to the non-GMO popcorn claim. My guess was the ingredients list would include soybean, canola, or corn oil.
The temperature for broiling in an oven is 260 degrees Celsius or  500 degrees Fahrenheit. Medium heat is about 177 degrees Celsius or  350 degrees Fahrenheit.
Place chicken in a broiler pan. Bake in the preheated oven for 10 minutes. Flip chicken and cook until no longer pink in the center and the juices run clear, about 15 minutes more. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C). Remove chicken from pan.