Question 4 O Mark this question A new pet food product for small dogs has been developed to help with tooth decay. Fifty-two dogs participate in the study. Each dog owner picks a card from a standard deck out of a hat. If the card is red, their dog will be in the treatment group. If the card is black, their dog will be in the placebo group. Which experimental design was used? O Randomized Block Design Completely Randomized Design Case-Control Design Matched-Pair Design