The young man went abroad to seek an ideal job, ________his parents' strong objection.[      ]

A. for the sake of   

B. in case of

C. regardless of   

D. because of

已知A物质发生分解反应生成B物质和C物质，当一定量A反应片刻后，生成56克B和44克C，则实际发生分解的A物质是（　　）

A．12g

B．44g

C．56g

D．100g