Which of the Following Statements About Logit and Probit Models

Multiple Choice

Which of the following statements about logit and probit models is true?
(I) They cannot be estimated by ordinary least squares
(II) They can be estimated using maximum likelihood
(III) They can be estimated using non-linear least squares
(IV) They can be estimated using instrumental variables

A) I only
B) I and II only
C) I, II and III only
D) I, II, III and IV