Olivia is testing the effectiveness of two antibiotics on the growth of bacteria in her lab. She has two Petri dishes that contained the same number of bacteria at the start of the experiment. After treating each dish with an antibiotic and then waiting a period of one hour, she calculates the number of bacteria remaining and records the results in the table below. Antibiotic A Antibiotic B 1 x 106 bacteria 1 x 105 bacteria Which of the following indicates the antibiotic that was more effective in killing the bacteria and the reasoning that supports the conclusion? O Antibiotic B is more effective because the first factor is the same for both, so the smaller exponent indicates more bacteria were killed off O The antibiotics had the same degree of effectiveness because the first factors are the same. O The antibiotic cannot be compared because they have different exponents. O Antibiotic A is more effective because the first factor is the same for both, so the larger exponent indicates more bacteria were killed off 73°F Sunny 3:10 PM D​