Given the following facts, create an educational game question appropriate for a K-12 student.
Fact: The state of California is the most populous state in the United States.
Question: Which state in the United States has the highest population? 
a) New York 
b) Texas 
c) California 
d) Florida
Complete the following task based on the instruction and optional input provided.### Instruction:
Given the following facts, create an educational game question appropriate for a K-12 student.

### Input:
Fact: The state of California is the most populous state in the United States.

### Output:
Question: Which state in the United States has the highest population? 
a) New York 
b) Texas 
c) California 
d) Florida