Researchers at East Tennessee State University wanted to test their prediction that offering incentives would encourage donations. Members of the "treatment group" were offered a lottery ticket if they donated. Members of the "control group" were offered no special incentive. The researchers found that offering a lottery ticket increased donations. What method of quantitative research did they use?

Experiment

Explanation: Scientific research embarked upon in other to test prediction or hypothesis is simply called an Experiment. Experiments are usually carried out in a controlled environment in other to control for external influences or manipulators. It may involve splitting subjects into groups, one is based on the hypothesis to test or validate and the other will be the opposite. The researchers in the context above, intends to validate or test an hypothesis about whether incentives would boost donation. The first group were given incentives while the other group weren't. Which turns out that incentives does boost donation.

is there a answer choice?

it´s related to his charming character.

beauty is not everything, although we can joke that girls only care about the physical or material aspect, the truth is that a real woman looks at more important things, besides intelligence and personality, there are other attitudes that make irresistible to men who are 'unattractive'.

for example develop your sense of humor.