The phrase "a sudden choice" is correct and usable in written English.
It can be used to describe a decision made quickly or unexpectedly, often without much thought or deliberation.
Example: "After much contemplation, she made a sudden choice to change her career path."
Alternatives: "an impulsive decision" or "a quick selection".
Albert Speer (1905-1981): Hitler's architect whose sudden choice as war production minister in 1942 was a rare inspiration.
"Before 1989, all you could buy in the shops was vinegar, and the Polish mentality is such that this sudden choice was very hard for people.
Among the debates and judgments the video footage of my mistakes has attracted, few have sincerely grappled with the sudden choices I had to make in challenging circumstances, and fewer still have earnestly asked whether my protected right to speak out as a US citizen requires that I must be perfect while doing so.
You can speculate why DARPA all of a sudden wants greater choice when it comes to issuing smartphones, but that would be a waste of time.
"All of a sudden, they have a choice," Mr. Thenell said of his employees, who were coached by Myhealthbank's staff on how to use its site and enroll for benefits.
"These are people who have been socialized for fifty years into a completely totalitarian culture, and all of a sudden they have to make choices about their lives and have no clue how to do it.
AIDS was a sudden plague, very visible in its choice of victims, and it has a vocal constituency in rich countries.
Let's say you're messing around on your computer, and all of a sudden Windows (or your firewall of choice) prompts you to open port 445 for a connection.
"Unless there is a sudden windfall of money, we have no choice but to close.
"This was, in reality, a choice you made, not a sudden, ill-considered act under immediate provocation".
