Which of the Following Are Forms of Market Efficiency

Multiple Choice

Which of the following are forms of market efficiency?
I. Strong form
Ii. Semistrong form
Iii. Semiweak form
Iv. Weak form

A) i and iii only
B) i and iv only
C) i, ii, and iv only
D) ii, iii, and iv only
E) i, ii, iii, and iv