Consider the following probability distribution for stocks A and B:

State	Probability	Return on Stock A %	Return on Stock B %
1	0.10	10	8
2	0.20	13	7
3	0.20	12	6
4	0.30	14	9
5	0.20	15	8

Which of the following portfolio(s) is(are) on the efficient frontier?

a.

The portfolio with 20 percent in A and 80 percent in B.

b.

The portfolio with 26 percent in A and 74 percent in B.

c.

The portfolio with 15 percent in A and 85 percent in B.

d.

A and B are both on the efficient frontier.

e.

The portfolio with 10 percent in A and 90 percent in B.