Cuitlahuac on February 5, 2020
The question asks to most support the above statements. The main conclusion seems to be that the bacteria strain induces ulcers. Answer E states, 2000 people without ulcers did not have the strain. Well, what do we know about the 2000 or more than 2000 who do have ulcers? Do they have the strain? Is that a valid question in this context or is it invalid because I am thinking about something not in the passage?
Annie on February 5, 2020