以CnHmCOOH所表示的羧酸0.1mol加成时需32g溴,0.1mol该羧酸完全燃烧,产生CO2和H2O共3.4mol,该羧酸是()
A.C15H27COOH
B.C15H31COOH
C.C17H31COOH
D.C17H33COOH