The old man said the accident ________careless driving，so a lot of money ________be paid by the driver.

A．was due to；was due to

B．due to；was due to

C．is due to；has due to

D．is due to；was due to

工程轮胎的种类可分为斜交式轮胎、带速斜交式轮胎、（）。