同治十三年，李鸿章奏：“轮船电报之速，瞬息千里；军器机事之精，工力百倍，炮弹所到，无坚不摧，水陆关隘，不足限制，又为数千年来未有之强敌。”为了应对强敌，他采取的主要措施是 [ ]

A．采取出卖国家利益方式求得和平

B．开展洋务运动实现富国强兵

C．通过改革政治制度以图自强

D．通过外交努力来“以夷制夷”

Your company, HealtNut Inc. , is a leading marketer of dietary supplements that can be produced quickly and without regulatory approval. Management wants to explore new markets and new products to boost revenue and profits. You are leading a team to identify potential products. Because of your background and interest in information technology, you recommended developing wireless communications products. But when you submitted the idea for review, executive management informed you that this product would not fit with the organization’s core competencies. You need to go back to the drawing board and recommend other products using management’s guideline as ______ .

A．an assumption

B．a constraint

C．a specification

D．a technical requirement