Answer:
Option A - 25.2 seconds
Explanation:
Given : Your friend swims on the school team. In her first four races, her times are 26.3, 28.4, 25.6, and 29.1 seconds.
To find : Which time listed for her next race would make the range larger? 
Solution : 
The range is the difference between the highest and lowest value. 
In the given values , 26.3, 28.4, 25.6, and 29.1
Lowest value is 25.6 
Highest value is 29.1 
To make a larger range,
We simply need to pick a number smaller than 25.6 or larger than 29.1. 
This will produce a larger difference (or range).
In the given options,
A. 25.2<25.6 seconds 
B. 26.1>25.6 seconds 
C. 28.0>25.6 seconds 
D. 29.1=29.1>25.6 seconds
Only option A satisfy the condition.
Therefore, Time for her next race would make the range larger is 25.2 second.