1- American put option prices can be calculated with

a) binomial trees but only if the stock pays dividends

b) binomial trees

c) binomial trees but only if the stock does not pay any dividends

d) the black scholes formula

2- The movements of a call option are:

a) uncorrelated with those of the underlying asset

b) negatively correlated with those of the underlying asset

c) difficult to measure

d) positively correlated with those of the underlying asset