Samples from posterior, calculates win probability, and selects the best option.
Note: this can be inefficient if you already have the win probability dataframe.
Only use this if that has not already been calculated.
Usage
find_best_option(posterior_samples, distribution)
Value
String: the best option name
Arguments
posterior_samples
Tibble returned from sample_from_posterior with 3 columns
`option_name`, `samples`, and `sample_id`.