You purchase 320 shares of DEF Inc. common stock at a current price of $49 per share. You already own 300 shares of GHI Inc. common stock which has a market value of $37.88 per share. If DEF Inc. has a beta of 0.7 and GHI Inc. has a beta of 1.2, what will the portfolio beta be if you combine your DEF and GHI shares into a two-asset portfolio?

a) 1.00

b) 0.91

c) 0.85

d) 0.95

e) 0.99