Question: Which of the following statements are true concerning the class of ARIMA(p,d,q) models?

(i) The "I" stands for independent

(ii) An ARIMA(p,1,q) model estimated on a series of logs of prices is equivalent to an ARIMA(p,0,q) model estimated on a set of continuously compounded returns

(iii) It is plausible for financial time series that the optimal value of d could be 2 or 3.

(iv) The estimation of ARIMA models is incompatible with the notion of cointegration
A: (ii) and (iv) only
B: (i) and (iii) only
C: (i), (ii), and (iii) only
D: (i), (ii), (iii), and (iv)
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option.