下列关于动物与其生存环境的关系的叙述中最确切的是     [ ]

A．动物受环境的限制，环境不受动物的影响  

B．动物与环境相互影响  

C．动物决定环境的改变方式  

D．环境对动物的生存总是有利的

An analyst does research about the financial leverage about a company and gathers the following information:
·Operating income is $180000
·Tax expense is $75000
·Interest expense is $80000
·Tax rate is 35%
The company's degree of financial leverage is closest to:

A. 1.4
B. 1.7
C. 1.8