A$.$

is less capital intensive and usually more profitable than unrelated diversification.

B$.$

offers ways for a firm to realize $1+1=3$ benefits because the value chains of the different businesses present competitively valuable cross$-$business relationships.

C$.$

passes the industry attractiveness test and thus offers the best route to $2+2=4$ benefits.

D$.$

involves diversifying into industries having the same kinds of key success factors.

E$.$

is less risky than either vertical integration or unrelated diversification due to lower capital requirements.