What is the author’s main purpose in the article? A to question who should control the ethical choices of driverless cars

B to examine the idea that driverless cars could be safer overall even if some lives are risked or lost in accidents

C to assert that the government should be held accountable for mistakes made and lives lost due to driverless car accidents

D to determine the best plan for having programs written for driverless cars to make ethical choices and who should be responsible for those programs