Based on the sentence, which transition best indicates a chronological sequence?
My face instantly flushed red, and I knew that I had to formulate a plan.
O Yesterday, I went to lunch as if nothing had happened.
O On the one hand, they did not care that I was embarrassed.
O First, I needed to act as if the ridicule didn't bother me at all.
O Fortunately, they did not notice, and I could pretend not to care.