The 1H NMR spectra of formic acid (HCO2H), maleic acid (cis-HO2CCH=CHCO2H), and malonic acid (HO2CCH2CO2H) are similar in that each is characterized by two singlets of equal intensity. Match these compounds with the designations A, B, and C on the basis of the appropriate 1H NMR chemical shift data. Compound A: signals at δ 3.2 and 12.1 ppm Compound B: signals at δ 6.3 and 12.4 ppm Compound C: signals at δ 8.0 and 11.4 ppm