推行ISO9000的作用是什么下面正确的组合是( )。
(1)强化品质管理，提高企业效益，增强客户信心，扩大市场份额
(2)获得了国际贸易“通行证”，消除了国际贸易壁垒
(3)节省了第二方审核的精力和费用
(4)在产品品质竞争中永远立于不败之地
(5)有效地避免产品责任
(6)有利于国际间的经济合作和技术交流

A．(1)(4)(5)(6)

B．(1)(2)(3)(4)

C．(3)(4)(5)

D．(1)(2)(3)(4)(5)(6)

If the price of product X increases from $2.00 per unit to $ 2.25 per unit, the demand will decrease from 7.5 million units to 6.7 million units. What is the price elasticity of demand for the product, and is the demand for the product elastic or inelastic（）

A. -1.04; elastic.

B. -0.96; elastic.

C. -0.96; inelastic.