A.資產(chǎn)組合的總風(fēng)險(xiǎn)≥個(gè)別資產(chǎn)風(fēng)險(xiǎn)加總
B.資產(chǎn)組合的總風(fēng)險(xiǎn)≤個(gè)別資產(chǎn)風(fēng)險(xiǎn)加總
C.資產(chǎn)組合的總風(fēng)險(xiǎn)=個(gè)別資產(chǎn)風(fēng)險(xiǎn)加總
D.資產(chǎn)組合的總風(fēng)險(xiǎn)≥個(gè)別資產(chǎn)風(fēng)險(xiǎn)加總的平均數(shù)