So far all cloned animals have suffered from some different serious disorders, _____ dying soon after birth. [ ]

A. many of which

B. many of whom

C. many of them

D. many of that

宏观经济发展水平和状况是影响股票价格的重要因素，这种影响因素的特点是( )。

A．干扰因素深

B．涉及范围广

C．作用机制复杂

D．对股票短期影响大