Dãy sắp xếp theo tính axit giảm dần trong các axit sau đây: CH3COOH, HCOOH

A. ${\mathrm{CH}}_3\mathrm{COOH}$ > HCOOH > ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{COOH}$ > ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{COOH}$.

B. HCOOH > ${\mathrm{CH}}_3\mathrm{COOH}$ > ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{COOH}$ > ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{COOH}$.

C. ${\mathrm{CH}}_3\mathrm{COOH}$ > HCOOH > C₃H₇COOH > ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{COOH}$.

D. ${\mathrm{CH}}_3\mathrm{COOH}$ > ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{COOH}$ > HCOOH > ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{COOH}$.