Which of the following statements is true?

a. The Black Scholes model is simpler to use, but for complex situations, the binomial model is the necessary tool

b. The Black Scholes model is the simplest to use and the best used for complex situations

c. The binomial model is better for complex situations and is the simplest tool to use

d. The Black Scholes model adequately handles the valuation of an American put.

e. the binomial model does not handle options with dividend payments prior to expiration date.