Which factor(s) is (are) most likely to enhance market efficiency? Group of answer choices A decrease in transaction costs thanks to discount brokers (i.e., Charles Schwab). A ban on short selling is implemented and enforced. The number of market participants is low. Increased number of financial information vendors with paid services.Under the Revenue Recognition principle, revenue is recognized when the good or service being produced: Group of answer choices is paid for by the customer is completed by the producer is controlled by the customer is controlled and paid for by the customer