Read these sentences from the text.

Question

“Next up at the driving school is the accident avoidance exercise. Students drive at highway speeds down a lane that splits into three lanes. Each lane has a signal light over it. At first, all three lights are green. Then, suddenly, one or more of the lights turns red, and students must immediately switch lanes to avoid an 'accident' ahead.”

What word or phrase could replace "At first" in the fourth sentence without changing the sentence's meaning?

instead
in particular
initally
later on

Answer 1

initially