I'd appreciate an answer to this.

here are the 30 best lifetime baseball batting averages of all time, arranged in order from lowest to highest.

  C.  0.366

Step-by-step explanation:

In this stemplot, it is apparent that the number on the right is the least-significant digit (thousandths digit) of the batting average. The two most-significant digits are to the left of the vertical line.

Hence the value 0.36 | 6 represents an average that is 36 hundredths plus 6 thousandths: 0.366.

The answer is B) 0.90