Kurt has researched T-Tek and believes the firm is poised to vastly increase in value. He has decided to purchase T-Tek bonds as he needs a steady stream of income. However, he still wishes that he could share in the firm's success along with the shareholders. Which one of the following bond features will help him fulfill his wish?
a. Put provision.
b. Positive covenant.
c. Warrant.
d. Crossover rating.
e. Call provision.