A news broadcaster reports the results of a study in which people who took fish oil supplements did not reduce their risk of heart attack. Two months later, a different broadcaster reports the results of another study claiming that taking fish oil daily decreases the risk of a heart attack by nearly 50 percent. Which factors could have affected the conflicting results of these studies? Check all that apply. physical condition of study participants bias of broadcasters diet of participants length of study education level of study participants genetic differences in study participants age of study researchers