Read the passage. Another drawback of the driverless car is the way it handles things on streets. In one example, a driverless car couldn’t respond to a police officer’s hand signals when he waved for it to stop at a green light. In another situation, the car was confused by a tumbleweed blowing across the road.

In which phrase does the writer most need to improve the word choice for clarity?

“way it handles things on streets”
“police officer’s hand signals”
“to stop at a green light”
“tumbleweed blowing across the road”