In a reaction, 2X → Y, the concentration of X decreases from 0.50 M to 0.38 M in 10 min. What is the rate in M s⁻¹ during this interval?

A. 2 x 10⁻⁴
B. 4 x 10⁻²
C. 2 x 10⁻²
D. 1 x 10⁻²