A college student decides to conduct an experiment to see which dating site is best at finding him a date. He randomly s

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A college student decides to conduct an experiment to
see which dating site is best at finding him a date. He randomly
selects ten individuals from three different dating sites. For the
first site, he invites the individuals to meet for lunch. For the
second site, he invites individuals to go dancing. For the third
site, he invites individuals to see a movie. He plans to compare
the number of individuals who accept his invitations for the three
sites. What, if anything, is wrong with this study?
Group of answer choices
Nothing is wrong with the study since he randomly
selected the individuals to invite on dates.
The sample size is too small.
There is confounding between the dating site and the
activity he invites the individuals to.
There is non-response bias since some of the
individuals will not respond to his invitations.