Tara works as a programmer for xyz electronics company. about one month ago, tara bought 500 shares of a small start-up firm with great technology because she heard rumors from the cfo's secretary that xyz was planning to purchase the smaller company and give it an infusion of cash. yesterday, xyz announced the decision to buy the small firm, which significantly increased the small company's stock price. tara most likely performed her trade based upon
a. public information
b. xyz's treasury stock
c. faulty information
d. insider trading information