Which one about sentiment mining is NOT correct? A) The sentiments mined from text may be subject to manipulate B) The sentiments mined from text reflect the actions users are going to take. C) Sentimentr is a package for sentiment analysis in R. D) Sentiment mining typically needs two dictionaries, one for positive words and one for negatives. Factor exposure refers to the coefficient obtained by regressing a stock current period return on a factor True False Which topic is NOT considered to be a Fintech topic of today's world? A) Corporate Finance B) Al based trading C) Big data alpha model D) Block-chain