Hermit, a Fashion Apparels Retailer, Recently Slashed Prices on Its

Hermit, a fashion apparels retailer, recently slashed prices on its premium fashion label, Lau, by 40%. This resulted in a sharp rise in sales of Lau by 30%. This also directly impacted the sales of its lower-priced brand, Infinity, which saw sales reduced by 15%. What is the cross-price elasticity of demand between Lau and Infinity?

A) 0.5
B) 0.37
C) 1.33
D) 2
E) 2.66