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
选项：

A:-1.04; elastic.
B:-0.96; elastic.
C:-0.96; inelastic.